A heterozygous organism is best described as which of these? Question options:

dominant

genotype

hybrid

true-breeding

The correct answer is Hybrid
Explanation : A heterozygous (Aa) individual is produced by a cross of two different true-breeding (AA and aa) individuals. Thus the heterozygous individual is a hybrid.

Hybrid

Explanation:

An HYBRID is a product of crossing two purebred organisms for a particular trait. In more genetic terms, hybrid contains two different alleles in its genotype; one from each different parent. For example, crossing a horse and a donkey will result in a mule.

Based on the above explanation of a hybrid organism, one would realize that in terms of genotype, an hybrid is usually heterozygous for the involved gene. That is, the genotype will contain one allele from each parent e.g. Aa or Dd. For instance, when crossing two purebred organisms (red, RR and white, rr) for color in four o'clock plants, the resulting organisms are heterozygous pink (Rr) and can be said to be a HYBRID.

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