Question

Two genes are present on same locus of homologous chromosomes but are slightly different in their phenotypic expression. This condition called?

• A. Alleles
• B. Heterozygous
• C. Homozygous
• D. Heterologous

Answer 1

The correct option is A Alleles

• Alleles are the alternative form of a gene present on homologous chromosomes. They occupy the same position on a chromosome and affect the same characteristic but in alternative ways. For example, a gene responsible for eye color can have two alleles one is for black and other is for brown.
  
• Homozygous contains identical pair of genes but heterozygous contains different set of genes.
  

So, the correct option is 'Alleles'.