Basic Genetics

Question 1

How many chromosomes do somatic cells of humans have?

Answer 1

46

Question 2

Which of the following must be true when using the Hardy-Weinberg equation?

Answer 2

the population must be large
mutations cannot occur
mating must occur randomly

Question 3

Which of the following best describes the structure of human chromosomes?

Answer 3

linear strands of DNA wound around histones

Question 4

In a pedigree analysis, what do vertical lines indicate?

Answer 4

offspring

Question 5

Which type of genetic change (mutation)is incapable of reverting back to the original phenotype?

Answer 5

Deletion

Question 6

Alternate forms of a gene that can occur at a single chromosome locus are referred to as:

Answer 6

alleles

Question 7

A gene, such as the O gene, that produces no detectable product is called:

Answer 7

An amorph

Question 8

When an individual is said to have blood group A, it refers to the individual’s:

Answer 8

phenotype