Question

Organism with two different alleles is called _____________.

• A. Heterozygous for gene
• B. Heterozygous for the allele
• C. Homozyous for the allele
• D. Homozygous for the gene

Answer 1

The correct option is A Heterozygous for gene

Heterozygous refers to having two different alleles for a single trait.

Alternate forms a gene is called an allele. For example, if tallness is determined by a gene and its alleles are represented by T and t. T represents dominant character and t represents recessive character. In short, it means that T or t cannot exist alone. But only as a pair. Thus there are some possible combinations like:

TT - The phenotype is tall

Tt - The phenotype is tall (one capital T is present, so becomes tall. Because T is dominant trait)

tt - The phenotype is short.