Question 1 :
Which one of the following is tested by the technique of amniocentesis<br>Or<br>The permissible use of the technique amniocentesis is for
Question 3 :
<p>In gastrulation, which of the forewing germ layer is /are formed?</p>
Question 4 :
Which can be seen in the transverse section of human testis? <br>A. Germinal epithelium<br>B. Seminiferous tubule <br>C. Ova <br>D. Sertoli cells
Question 6 :
<p>The edges of infundibulum possess finger-like projection called …A… which helps in the collection of ovum. The infundibulum leads to wider part of the oviduct called …B… . Last part of oviduct, …C…. has narrow lumen and joins to uterus.</p><p>A, B and C in the above statement refers to</p>
Question 7 :
After birth, colostrum is released from mammary glands which is rich in
Question 9 :
Assertion (A): Generally, a woman does not conceive during lactation period.<br />Reason(R): The hormone prolactin initiates and maintains lactation in a woman.
Question 11 :
The following events occur in the replication of DNA. <br>1. Bonds between complementary bases break <br>2. Bonds between complementary bases form <br>3. DNA molecule uncoils <br>4. Opposite strands uncoils <br>5. sugar-phosphate bonds form <br>6. Free nucleotides align with complementary nucleotides on each strand <br>In which order do these events take place?
Question 13 :
Which of the following is incorrect regarding ZW-ZZ type of sex determination?
Question 14 :
Among the following characters, which one was not considered by Mendel in his experiments on pea{tex}?{/tex}
Question 15 :
Which one of the following cannot be explained on the basis of Mendel's law of dominance{tex}?{/tex}
Question 17 :
Observe the phenotypic effect of a gene with 2 alleles-B and b in pea plant.<table><th><b>Genotype</th><th>Grain Size</th><th>Grain Shape</th></b><tr><td>BB</td><td>Large</td><td>Round</td></tr><tr><td>Bb</td><td>Intermediate</td><td>Round</td></tr><tr><td>Bb</td><td>Small</td><td>Wrinkled</td></tr></table>Which of the following extract is incorrect in concern to above facts?
Question 19 :
Which is genetically-transmitted diseases? <br>A. Colour blindness <br>B. Haemophilia <br>C. Muscular dystrophy <br>D. None of these
Question 20 :
There are three genes a, b, c. Percentage of crossing over between a and b is 20{tex}\%{/tex}, b and c is 28{tex} \% {/tex} and a and c is 8{tex} \% {/tex}. What is the sequence of genes on chromosome?
Question 21 :
<p> <font face="Cambria Math, serif">If heterozygous dominant (tT) crossed with homozygous dwarf plant, then the percentage of progeny having dwarf character is</font></p>
Question 22 :
<p> <font face="Cambria Math, serif">Which cross was used to study the independent assortment?</font></p>
Question 24 :
<p> <font face="Cambria Math, serif">Sex chromosomes of a female bird are represented by</font></p>
Question 25 :
<p> <font face="Cambria Math, serif">Frameshift mutation and base pair substitution changes the</font></p>