1 Lecture 3: Class 12 Solution Complete NCERT

If a cell in G1 has 32 chromosomes, then at the end of meiosis I there will be _________ chromosomes in each daughter cell, and __________ sister chromatids in each daughter cell. Answers choices: a. 32, 32 b. 16, 32 c.16, 16 d. 8, 8 e. 8, 16 f. 32. 63

In the cross between two RrTtYy plants, what is the expected frequency of offspring

a. 1/32 b. 1/8 c. 1 d. 1/16

with the same genotype as the parents (i.e., RrTtYy)?

a. 1/2 b. 1/16 c. ¼ d. 1/8 e. 0 f. 1/64 g. 1 h. 1/32

In an example of recessive epistasis the product H substance is needed to express the blood antigen. A mating of IB I O Hh X I A I O Hh should produce what ratio of blood types?

a.

1/4 AB, 1/8 A, 1/8 B, 1/2 O

b.

3/8 AB, 3/16 A, 3/16 B, 1/4 O

c.

3/16 AB, 3/8 A, 3/16 B, 1/4 O

d.

1/4 AB, 3/16 A, 3/16 B, 3/8 O

e.

3/16 AB, 3/16 A, 3/16 B, 7/16 O