Question

Please answer 7th question... ​

Answer 1

The females carry two X-chromosomes. Females produce one type of gametes (eggs) with same type of chromosomes (22 + X). ... Among the male gametes, half of the sperms carry X-chromosome (22 + X) and half carry Y-chromosome (22 + Y). Thus female is homogametic and male is heterogametic.

Answer 2

Dominant Gene/Factor/Trait/Allele:

1. It is able to express itself even in the presence of its recessive allele.

2. It does not require another similar allele to produce its effect on the phenotype, e.g., Tt is tall.

3. Dominant allele or factor can form complete polypeptide or enzyme for expressing its effects, e.g., red colour of flower in Pea.

Recessive Gene/Factor/Trait/Allele:

1. Recessive allele or factor is unable to express its effect in the presence of dominant allele.

2. It produces its phenotypic effect only in the presence of a similar allele, e.g., tt is dwarf.

3. The recessive allele forms an incomplete or defective polypeptide or enzyme so that the expression consists of absence of the effect of dominant allele, e.g., white flower colour in Pea.