Human Genetics

How many chromosomes do humans typically have?

• 46

• 45

• 47

• 23

A picture of chromosomes that are arranged from largest to smallest is called a(n) _____.

• Karyotype

• Genome

• PMAT

• Nondisjunction

Chromosome pairs 1 through 22 are called _____.

• sex chromosomes

• autosomal chromosomes

Chromosome pair 23 is called _____.

• sex chromosomes

• autosomal chromosomes

What are the female sex chromosomes?

• XX

• XY

• YY

• XZ

What are the male sex chromosomes?

• XX

• XY

• YY

• XZ

What is the sex of the individual shown in the karyotype below?

• Male

• Female

How many chromosomes does the individual shown in the karyotype have?

• 23

• 45

• 46

• 47

At what pair of chromosomes does the disorder occur?

• Pair 13

• Pair 18

• Pair 21

• Pair 23 (Sex chromosomes)

If an individual does not have a disorder but can pass on the disorder to future offspring, the individual is considered _____.

• homozygous dominant

• homozygous recessive

• heterozygous

• a carrier