Question

___ interact to produce a trait in which neither dominant gene can produce its effect in the presence of the other.

Answer 1

Out of the following given choices;

Multiple Alleles

Chromosomes

Carriers

Sex-linked genes

The answer is multiple alleles. While we are used to diploid organisms like humans having two alleles (on same loci of each chromosome of homologous paired chromosomes) for a particular gene, it is thus the case there are two alleles in a population that determine a particular trait. However, there can be more than two alleles in a population that determine a particular trait. Individuals in the population may have different forms of the allele for the trait (please note that a diploid individual can still hold only two alleles). This, therefore, means that they are more than two alleles in the population that determine a trait such as coat/fur color (or blood type in humans). These are what are referred to as multiple alleles. The alleles interact with different degrees of dominance over others alleles hence the various phenotypes formed form their interaction.

Answer 2

In the sentence "___ interact to produce a trait in which neither dominant gene can produce its effect in the presence of the other." the word that completes the sentence is sex linked genes. Genes on the X or Y chromosome are called sex-linked. The sex linked genes are usually dominate and recessive.