Question

(a) If a normal human cell has 46 chromosomes, how many chromosomes will be there in a human (i) sperm cell, and (ii) zygote?
(b) What sizes of plants are produced if both parents have genes Tt?

Answer 1

(a) (i) A sperm cell will have half the number of chromosomes than present in a normal cell. Hence, the number of chromosomes present in it will be 23.
(ii) Number of chromosomes in a zygote will be same as present in a normal cell. Hence, the number of chromosomes present in it will be 46.

(b) Tall and dwarf plants will be produced in the ratio 3:1.