Exam 7: Chromosomes and Human Genetics

A man with a translocation in a chromosome that does not affect gene function may not realize he has a translocation until he attempts to have a child. Explain how a translocation that does not affect the individual may become problematic during reproduction.

Both members of a couple are carriers for a recessive disease allele. If the couple has four children, which of the following statements must be true?

What information is NOT visible in a karyotype?

The karyotype shown is from a(n)

Does the pedigree shown most likely represent a condition that is autosomal recessive, dominant, or sex-linked? Explain your reasoning.

If a recessive allele causes a fatal disease that kills the affected individual before he or she can reproduce, why doesn't that allele quickly become extinct in the population?

Except for the sex chromosomes, all the chromosomes shown in a karyotype are numbered and are called ________.

The parents in the figure shown are carriers of a genetic disorder. Based on the Punnett square, the allele that causes the disorder must be