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Lakhmir Singh Solutions Class 10 Biology Solutions for Exercise in Chapter 4 - Heredity and Evolution

Question 16 Exercise

(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:

(a) (i) The number of chromosomes present in it will be 23 as the sperm cell will have half the number of chromosomes than present in a normal cell.

(ii) The number of chromosomes present in it will be 46 as the number of chromosomes in a zygote will be same as present in a normal cell.

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

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