Question

which of the following genetic relationships in a human cell are accurate?
correct answer(s)
a human cell should contain fewer alleles
than homologues.
a human cell should contain about twice as
many alleles as gene loci.
a human cell should contain more
homologues than chromosome pairs.
a human cell should contain more
chromosomes than genes.
incorrect answer(s)

Explanation:

• A human cell should contain fewer alleles than homologues: Incorrect. Each gene locus can have multiple alleles, and homologues are pairs of chromosomes. There are more alleles (as multiple can exist for each gene) than homologues (which are just pairs of chromosomes).
• A human cell should contain more homologues than chromosome pairs: Incorrect. Homologues are chromosome pairs. So the number of homologues is equal to the number of chromosome pairs.
• A human cell should contain about twice as many alleles as gene loci: Correct. In a diploid human cell, for each gene locus (on a chromosome), there are two alleles (one on each homologous chromosome).
• A human cell should contain more chromosomes than genes: Incorrect. Each chromosome contains many genes. So there are more genes than chromosomes.

Answer:

A human cell should contain about twice as many alleles as gene loci.