Given below is a group of terms. In the group, the first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.
TT : Homozygous : : Tt :
.................
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Solution
TT : Homozygous : : Tt : Heterozygous.
When a gene pair (alleles) contains two different genes controlling different traits of a character in an organism then the organism is considered as heterozygous for that particular character.