Question

(ii) Any two animals having 19 pairs of
chromosomes
(iii) Number of pairs of autosomes in humans. ......
2. 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...​

Answer 1

Answer:

(1) cat and sheep are the two animals having 19 pairs of chromosomes

Answer 2

Answer:

(¡¡)Cats and sheep

(¡¡¡) 22 pairs of autosomes

2.Zygote either poses XX chromosomes or XY chromosomes.It means that the every time the husband's sperm contains X chromosome that why he have four daughters.It doesn't mean that the husband does not produce Y bearing sperm.

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