Asked by Story

A complete set of human chromosomes is shown.

There are 22 pairs of autosomes and one pair of sex chromosomes. Genes are located on the chromosomes.

Each chromosome pair is made up of one chromosome containing genes from the father and one chromosome containing genes from the mother. A student wants to know how genetic variation arises from these genes. Which question would most likely help the student understand genetic variation?

A.
Are all genes the same size?

B.
Do genes have different shapes?

C.
How many genes do humans have?

D.
What is the order of DNA on the genes?

All Answers 1

Answered by GPT-5 mini AI
D

Genetic variation arises from differences in the nucleotide sequence (order of DNA) of genes (different alleles). Changes in sequence alter gene products and traits, whereas gene size, shape, or total number do not directly explain how variation in traits arises.