Question

Which of the following is incorrectly matched? Group of answer choices

physical expression of a trait - phenotype

allele whose expression can be masked by an alternate

allele - recessive allele that masks expression of alternate allele - dominant

identical alleles - homologous

Answer 1

Incorrectly matched option is :

Identical alleles - Homologous.

Explanation: Corresponding loci on each paired chromosome is known as Homologous. Homologous alleses are the alleles that inhabit the homologous loci. They code for the same trait even if they contain different information. For example, one chromosome may have an allele that codes for blue eye color. The homologous allele on the second chromosome in the pair may code for brown eye color.

If a organism contains both same alleles they are known as Homozygous alleses .

Why others are correctly matched:

Physical expression of a trait - phenotype:

Observable physical properties of an organism is known as phenotype. Phenotypes depend on the genotype of the organism.

Alleles whose expression can be masked by alternate alleles- recessive allele.

Recessive allele is a gene whose effect is not expressed unless it is present as a homozygous form in the individual. In heterozygous individual the dominant allele masks the trait of recessive allele. So the recessive traits can't be expressed.

Allele that masks expression of alternate allele - dominant allele:

The dominant allele is a gene which produces its effect though there is presence of another recessive allele. Dominant allele doesn't have to be in a homozygous form to express its trait.