For a given trait, the two genes of an allelic pair are not alike. An individual possessing this gene combination is said to be (1) homozy- gous for that trait (2) heterozygous for that trait (3) recessive for that trait (4) pure for that trait

For a given trait, the two genes of an allelic pair are not alike. An individual possessing this gene combination is said to be (1) homozygous for that trait (2) heterozygous for that trait (3) recessive for that trait (4) pure for that trait.

To answer this question, we need to understand the terms and concepts mentioned. Let's break it down step by step:

1. Homozygous: Homozygous refers to a condition where an individual has two identical alleles for a particular trait. In this case, since the two genes of the allelic pair are not alike, the individual cannot be homozygous for that trait.

2. Heterozygous: Heterozygous refers to a condition where an individual has two different alleles for a particular trait. Since the two genes of the allelic pair are not alike, the individual possessing this gene combination is indeed heterozygous for that trait.

3. Recessive: Recessive refers to a trait that is expressed only when an individual has two copies of the same allele. In this case, since the two genes of the allelic pair are not alike, we cannot determine if the trait is recessive or not based on the given information.

4. Pure: Pure refers to a condition where an individual has two identical alleles for a particular trait and is homozygous for that trait. Since the two genes of the allelic pair are not alike, the individual cannot be pure for that trait.

Therefore, the correct answer to the question is (2) heterozygous for that trait.