Question

29/31 which of the following is heterozygous gg rr ff tt

Explanation:

Step1: Recall heterozygous definition

Heterozygous means having two different alleles (e.g., one dominant, one recessive) for a gene, represented as two different letters (e.g., Gg). Homozygous has two identical alleles (e.g., RR, FF, tt).

Step2: Analyze each option

• Gg: Different alleles (G and g) → heterozygous.
• RR: Identical alleles (R and R) → homozygous.
• FF: Identical alleles (F and F) → homozygous.
• tt: Identical alleles (t and t) → homozygous.

Answer:

A. Gg