Question

1. an allele that will not show its effect when there is only one present
2. having two identical alleles of the same gene
3. having two different alleles of the same gene

d. homozygous
e. heterozygous
f. recessive

Explanation:

• For question 11: A recessive allele does not show its effect when only one is present (as the dominant allele masks it).
• For question 12: When an organism has two identical alleles of the same gene, it is homozygous.
• For question 13: When an organism has two different alleles of the same gene, it is heterozygous.

Answer:

1. F. recessive
2. D. homozygous
3. E. heterozygous