Question 6 :
In grasshoppers and moths, there are two pairs of autosomes and 
Question 8 :
When the glandular cells breakdown completely, the gland is known as ______________.
Question 10 :
If X/A ratio of two $Drosophila$ is 0.6 and 0.33 respectively, what would be their sex?
Question 11 :
Which of the following true for an offspring formed as a result of sexual reproduction? <br/>
Question 13 :
The period of life, when the body undergoes changes, leading to reproductive maturity, is called as<br/>
Question 17 :
Sex determination ratio in an organism is given by X/A = 1.5, then the organism will be
Question 18 :
What will happen, if the sperm containing $'X'$ chromosomes fertilises the Ovum?
Question 23 :
In our society women are blamed for producing a female child. Choose the correct answer for sex determination in humans due to
Question 25 :
A normal sperm in humans possess<br/>I. an X chromosome<br/>II. 23 chromosomes<br/>III. a Y chromosome
Question 28 :
A family has five girls and no son. Probability of son as the6th child will be<br>
Question 30 :
In which of these the sex chromosome have discovered for the first time?
Question 31 :
.......... is the period between the beginning of sexual maturation and entry into the adult life.
Question 33 :
The theory where ratio between the number of X chromosomes and number of complete sets of autosomes will determine the sex is known as
Question 36 :
Which one of the following conditions of the zygotic cell will produce a normal human female child?
Question 40 :
Which of the following symbols are used for representing sex chromosome of birds?
Question 43 :
Heterogamety or formation of two types of gametes is found in.
Question 46 :
Endocrine glands release hormones directly into the blood. ............. transports it to the target organs .................. <br/>
Question 47 :
If a couple has two boys and one girl, the probability of the next girl child to be born is
Question 48 :
Endocrine glands can be defined as those glandswhich pour their secretion
Question 58 :
Which condition of zygote cell will lead to birth of a normal human female child
Question 61 :
Person 'A' is having XX chromosome and person 'B' has XY chromosome. Which option is correct for these persons?
Question 64 :
Which one of the following conditions correctly describes the manner of determining the sex in the given example?<br/>
Question 66 :
If somatic cells of a human male contain a single barr body, the genetic composition of the person would be <br/>
Question 70 :
Genic balance theory for sex determination in<i> Drosophila </i>was proposed by
Question 74 :
In <i>Drosophila</i> the XXY condition leads to femaleness whereas in human beings the same condition leads to Klinefelter's syndrome in male. It proves that<br/>
Question 75 :
Which one of the following correctly describes the manner of determining the sex in the given examples?
Question 76 :
Which of the following statements is correct in relation to the endocrine system?
Question 77 :
Which of the following is an indication of adolescence growth spurt?
Question 78 :
Assertion: In humans, the gamete contributed by the male determines whether the child produced will be male or female.
Reason: Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on X-chromosome and some on Y - chromosome.
Question 81 :
A couple has $8$ children, all boys. What is the chance that their ninth child will be another boy?
Question 83 :
<i>Drosophila</i> flies with one half of the body male and other half female is referred to as<br/>
Question 87 :
Which of the following shows the sex chromosomes in the body cells and in the sex cells in a female?
Question 88 :
I am ductless gland. I secrete chemicals which are transported by the blood to target cells. Who am I?<br/>
Question 91 :
If somatic cells of a human male contain single Barr body, the genetic composition of the person would be
Question 94 :
The theory where ratio between the number of X-chromosomes and number of complete sets of autosomes will determine the sex is known as<br/>
Question 97 :
<i>Drosophila</i> flies with XXY genotype are females, but human beings with such genotype are abnormal males. It shows that<br/>
Question 98 :
A person suffering from Klinefelter syndrome will have how many barr bodies?
Question 99 : Match list -I with list II and select the correct answer from the code given below this lists.<br><table class="wysiwyg-table"><tbody><tr><td></td><td><b>List I</b></td><td></td><td><b>List II</b></td></tr><tr><td>A</td><td>Neoteny</td><td>I</td><td>Axolotl larva</td></tr><tr><td>B</td><td>Parthenogenesis</td><td>II</td><td>Dragon fly</td></tr><tr><td>C</td><td>Retrogressive metamorphosis</td><td>III</td><td>Honey bee</td></tr><tr><td>D</td><td>Incomplete metamorphosis</td><td>IV</td><td>Ascidian larva</td></tr></tbody></table>
Question 100 :
Assertion: In humans, the gamete contributed by the male determines whether the child produced will be male or female.
Reason: Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on X-chromosome and some on Y-chromosome.
Question 101 :
Assertion: XX-XY type of sex determination mechanism is an example of female heterogamety and is found in Drosophila.
Reason: Male heterogamety is seen in moths where males produce two different types of gamete.
Question 103 :
Assertion: Amniocentesis is a process of foetal sex determination.
Reason: Metabolic errors and other diseases can be diagnosed prenatally by this process.
Question 104 :
Gender of child is determined by the male partner of couple. Explain with reasons whether this statement is true or false?
Question 105 :
Mrs. Verma has an autosomal gene pair 'Bb' and she contain x-linked gene 'd'. What is the percentage of gamete, which contain 'bd' genes?
Question 106 :
In which group of organism, the male has one less chromosome than female?
Question 107 :
What is the inheritance of colour blindness of both parents having a normal vision but mother having a recessive gene for colour blindness?
Question 108 :
The sex of an infant is not a case of inheritance of characteristics.
Question 109 : Match the hormone in column I with their function in column II.<br><table class="wysiwyg-table"><tbody><tr><td></td><td>List I</td><td></td><td>List II</td></tr><tr><td>A</td><td>Oxytocin</td><td>1</td><td>Prepare endometrium for implantation</td></tr><tr><td>B</td><td>LH</td><td>2</td><td>Develops female secondary sexual characters</td></tr><tr><td>C</td><td>Progesterone</td><td>3</td><td>Contraction of uterine wall<br></td></tr><tr><td>D</td><td>Estrogen</td><td>4</td><td>Development of corpus luteum.</td></tr></tbody></table>
Question 112 :
Assertion: In humans, the gamete contributed by the male determines whether the child produced will be male or female.
Reason: Sex in humans in a polygenic trait depending upon a cumulative effect of some genes on X chromosome and some on Y chromosome.
Question 116 :
Which of the chromosomal formulation is responsible for the expression of meta-male character in $Drosophila$?
Question 117 :
Male XX and female XY sometime such conditions occur due to
Question 118 :
Assertion: In humans the gamete contributed by the male determines whether the child produced will be male or female.
Reason: Sex in humans is polygenic trait dependent upon the cumulative effect of some genes on X-chromosome and some on Y-chromosome.
Question 119 :
In $Drosophila$ formation of gynandromorph and their cytological explanation provide best evidence that
Question 121 :
Eye colour in fruitfly is a sex linked trait and the cross of white eyed female with red eyed male gives red eyed females and white eyed males. Rarely this cross may give all white eyed females and red eyed males. This was found to be due to non-disjunction of
Question 122 : Match the following:<br/><table class="wysiwyg-table"><tbody><tr><td>A. Islets of Langerhans</td><td>1. Calcitonin </td></tr><tr><td>B. Pituitary gland</td><td>2. Epinephrine</td></tr><tr><td>C. Thyroid gland</td><td>3. Growth hormone</td></tr><tr><td>D.Adrenal gland</td><td>4. Insulin</td></tr></tbody></table>
Question 124 :
Double fertilisation is characteristics of which of the following plant category?
Question 127 :
In which stage of complete metamorphosis does a creature develops cocoon around it?
Question 130 :
The tube which conveys both urine and sperm inmale is called
Question 132 :
The process of fusion between male nucleus and egg nucleus is called as 
Question 133 :
Which of the following statements is not correct regarding oviparous animals?
Question 135 :
Sexual reproduction involves formation of the male and female gametes by?
Question 137 :
Which of the following patterns of reproduction involves both the parents?
Question 140 :
Which one of the following generates new genetic combinations leading to mutations<br>
Question 145 :
Which one of the following events in a botanical garden is never directly influenced by light?
Question 148 :
Which of these organisms reproduce in the same way as yeast?
Question 151 :
A gradual decrease in the size of the tail during metamorphosis in the life cycle of frog is a good example for
Question 154 :
On the basis of reproduction, animals are classified into .......... type.
Question 161 :
In which stage of complete metamorphosis a creature doesn't eat anything?
Question 169 :
Which of the following patterns of reproduction involves the exchange of genetic material?
Question 170 :
............. should be present in the water for metamorphosis of tadpoles.
Question 171 :
The function of thyroxine hormone in frog is to control the
Question 173 :
The process of conversion of a small cockroach into an adult cockroachis called as <br/>
Question 174 :
The flowers may be of two or more types with regard to the length of style and lengths of stamens is called as
Question 181 :
Reproduction of immature or larval stage of animals caused by the acceleration of maturation is called as
Question 182 :
Name the hormone released during the following events$:$<br/>Development of a caterpillar to moth<br/>
Question 184 :
Which of the following has been observed for the first time by Treub?
Question 187 : Some organisms and their type of reproductions are given below. Find the correct alternative showing the correct pair-<br/><table class="wysiwyg-table"><tbody><tr><td>(a) Paramecium<br/></td><td>(1) Spore formation<br/></td></tr><tr><td>(b) Hydra<br/></td><td>(2) Budding<br/></td></tr><tr><td>(c) Mucor<br/></td><td>(3) Fission<br/></td></tr><tr><td>(d) Spirogyra<br/></td><td>(4) Fragmentation<br/></td></tr></tbody></table>
Question 190 :
When an ovary develops into a fruit without fertilization it is called as .............
Question 194 :
In which plants, there will be less pollen wasted, no agent required and fertilization is sure to occur. The plants that undergo 
Question 197 :
In cloning of cattle, a fertilized egg is taken out of the mother's womb and
Question 199 :
<b>Statement $1$</b>: Viviparous animals give better protection to their offspring.<br/><b>Statement $2$</b>: In viviparous animals, young ones, after attaining a certain state of growth, are delivered out of the body of the female organism.
Question 202 :
How many parents were involved in cloning and production of Dolly?
Question 203 :
Axolotl larva shows<br>i. Neoteny and paedogenesis<br>ii. Absence of thyroxine affects metamorphosis<br>iii. It is hemichordate<br>
Question 204 :
Which of the following organism was the cytoplasmic donor of Dolly?
Question 207 :
Which of the following statement is or are true?<br/>A - Endothecium lies behind epidermis.<br/>B - Fusion of egg with male gamete is called apogamy.<br/>C - Synergids are haploid.<br/>D - The point are which funicle touches the ovule is raphe.
Question 208 :
Assertion: Viviparous animals give better protection to their offsprings.
Reason: They lay their egg in safer places in the environment.
Question 209 :
In the angiosperms a unique process is observed in the embryo sac, this is .....................
Question 210 : Match the following (w.r.t type of metamorphsis involved).<table class="wysiwyg-table"><tbody><tr><td></td><td>Column I</td><td>Colimn II</td></tr><tr><td>a</td><td>Paurometabolous</td><td>Silk worm</td></tr><tr><td>b</td><td>Hemimetabolous </td><td>Grasshopper </td></tr><tr><td>c</td><td>Holometabolous</td><td>Silver fish</td></tr><tr><td>d</td><td>Ametabolous</td><td>Dragon fly</td></tr></tbody></table>
Question 213 :
Axolotl larva of Ambystoma/tadpole of frog normally fails to metamorphose due to<br/>
Question 214 :
Which one of the following is the primary female sex hormone?
Question 217 :
A larval stage occurs in the life history of all members of the group<br/>
Question 219 :
The fusion of secondary nucleus with the second male gamete is triple fusion and the resultant nucleus is triploid or 3 $n$. This is the .................
Question 222 :
Organisms such as .......... can regenerate if they are broken into pieces.<br>
Question 223 :
How many plants in the list given below have a marginal placentation?<br/>Mustard, Gram, Tulip, <i>Asparagus</i>, Arhar, Sum hemp, Chilli, Colchicine, Onion, Moong, Pea, Tobacco, Lupin.
Question 224 : In which one of the following combinations(a -d) the number ofchromosomes ofthe presentday hexaploid wheat is correctly represented?<table class="wysiwyg-table"><tbody><tr><td>Combination</td><td>Monosomic</td><td>Haploid</td><td>Nullisomic</td><td>Trisomic</td></tr><tr><td>a)</td><td>21</td><td>28</td><td>42</td><td>43</td></tr><tr><td>b)</td><td>7</td><td>28</td><td>40</td><td>42</td></tr><tr><td>c)</td><td>21</td><td>7</td><td>42</td><td>43</td></tr><tr><td>d)</td><td>41</td><td>21</td><td>40</td><td>43</td></tr></tbody></table>
Question 225 :
Which of the following is correct among the differences in between pollination and fertilization?<br>
Question 230 :
The mechanism of fertilization involves different events like approximation of gametes, acrosomal reaction activation of egg and amphimixis. According to F.R. Lillie approximation occurs due to interacting complementary substances called fertilizin and anti fertilizin.<br>The fertilization membrane is formed in order to<br>
Question 233 :
Which of the following hormones regulates growth and metamorphosis in insects?
Question 234 :
To avoid self pollination and provide contrivance for cross pollination, the pollen grains of some flowers have no fertilizing effect on the stigma of the same flower but causes death. What is this condition called as?
Question 236 :
If a trace of thyroid extract is put to water containing tadpoles, it will<br/>
Question 239 :
Choose the correct statements from the options below with regard to sexual reproduction.<br/>(i) Sexual reproduction does not always require two individuals.<br/>(ii) Sexual reproduction generally involves gametic fusion.<br/>(iii) Meiosis never occurs during sexual reproduction.<br/>(iv) External fertilization is a rule during sexual reproduction.<br/><br/>
Question 241 :
Development of animal embryo from egg without fertilization is called as<br/>
Question 244 :
Assertion: The honey bee queen copulates only once in her life time.
Reason: The honey bee queen lays fertilized as well as unfertilized eggs.
Question 247 :
The mechanism of fertilization involves different events like approximation of gametes, acrosomal reaction activation of egg and amphimixis.  According to F.R. Lillie approximation occurs due to interacting complementary substances called fertilizin and anti fertilizin.<br/>Fertilizin is <br/>
Question 249 :
Efforts to repeat the cloning of Dolly the sheep have been unsuccessful. The scientists who claim to have cloned Dolly have been challenged to produce additional evidence that Dolly is really derived from an adult cell (as originally claimed), rather than fetal cells which might have contaminated the experiment (as the skeptics suggest). Which of the following could provide evidence that Dolly was created from an adult cell, rather than a fetal cell
Question 251 :
Assertion: Protandry and protogyny ensures cross fertilization.
Reason: Cross fertilization introduces variation in progeny.
Question 252 :
Nucleus of a donor embryonal cell/somatic cell is transferred to an enucleated egg cell. Then after the formation of organism, what shall be true?
Question 253 : Match the items in column I with column II and choose the correct option.<br/><table class="wysiwyg-table"><tbody><tr><td></td><td><b>Column I</b></td><td></td><td><b>Column II</b></td></tr><tr><td>A.</td><td>Binary fission</td><td>1.</td><td>Algae</td></tr><tr><td>B.</td><td>Zoospore</td><td>2.</td><td>Amoeba</td></tr><tr><td>C.</td><td>Conidium</td><td>3.</td><td>Hydra</td></tr><tr><td>D.</td><td>Budding</td><td>4.</td><td>Penicillium</td></tr><tr><td>E.</td><td>Gemmules</td><td>5.</td><td>Sponge</td></tr></tbody></table>
Question 257 :
The process by way of which a larva or miniature adult comes out of the egg membranes is known as
Question 261 :
In an experiment, sperms removed from epididymis of a man were added in a dish containing appropriate media and oocyte. No fertilisation was seen. However, when sperms from epididymis were directly placed in uterus of an ovulated woman, she became pregnant. These observations suggest that
Question 263 :
Assertion: Self-pollination helps in purity of races, wastage of pollen is avoided and pollination is sure.
Reason: Cleistogamy favours self-pollination.
Question 264 :
How sexual reproduction gives rise to more viable variations than asexual reproduction?<br>
Question 266 :
Triple fusion was discovered in this plant possessing naked bulb, fleshy leaf bases and loculicidal capsule
Question 268 :
A few statements describing certain features of reproduction are given below.<br>(i) Gametic fusion takes place.<br>(ii) Transfer of genetic material takes place.<br>(iii) Reduction division takes place.<br>(iv) Progeny have some resemblance with parents.<br>Select the options that are true for both asexual and sexual reproduction from the options given below.
Question 270 : Match list -I with list II and select the correct answer from the code given below this lists.<br><table class="wysiwyg-table"><tbody><tr><td></td><td><b>List I</b></td><td></td><td><b>List II</b></td></tr><tr><td>A</td><td>Neoteny</td><td>I</td><td>Axolotl larva</td></tr><tr><td>B</td><td>Parthenogenesis</td><td>II</td><td>Dragon fly</td></tr><tr><td>C</td><td>Retrogressive metamorphosis</td><td>III</td><td>Honey bee</td></tr><tr><td>D</td><td>Incomplete metamorphosis</td><td>IV</td><td>Ascidian larva</td></tr></tbody></table>
Question 271 :
Assertion: Dolly was a female domestic sheep, and the first mammal cloned by somatic cell nuclear transfer
Reason: Cell nucleus from an adult somatic cell is transferred into an unfertilized oocyte
Question 272 :
A hatching egg of chick is covered by plaster of paris. It is harmful for
