Question

Given below are groups of terms. In one group the first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.

TT : Homozygous :: Tt : ___________

Answer 1

Homozygous-

1. The condition in which a pair of chromosomes carries similar alleles for a particular character.
2. Example: A color-blind daughter will have both the X chromosomes with defective alleles.

Heterozygous-

1. The condition in which a pair of chromosomes carries dissimilar alleles for a particular character.
2. Example: A daughter (XX°) from a normal homozygous mother (XX) for color vision and a color-blind father (X°Y) has one normal and one defective allele.

Final Answer: TT: Homozygous:: Tt: Heterozygous