Question

a fertilized egg that has received a different form of a specific gene from each parent is called
○ homozygous.
● heterozygous.
○ allele-identical.
○ chromosomal.

Explanation:

To solve this, we analyze each option:

• Homozygous: Has identical alleles for a gene from both parents. Eliminated as the question states different forms.
• Heterozygous: Has different alleles (forms of a gene) from each parent. This matches the description.
• Allele - identical: Implies same alleles, which contradicts "different form". Eliminated.
• Chromosomal: Related to chromosomes in general, not about gene forms from parents. Eliminated.

Answer:

B. heterozygous.