Mention the following:

(i) Total number of pairs of chromosomes in each body cell in humans …………… .

(ii) Number of pairs of autosomes in one cell of humans …………… .

A certain couple got only four daughters in a row and no son. Does it mean that the husband does not produce Y-bearing sperms? Explain.

Define the following terms :-

(i) Allele

(ii) Dominant gene

(iii) Genotype

(iv) Phenotype

(v) Recessive gene

Mention the number of paired homozygous chromosomes in

(i) Human female

(ii) Human male