Genetics and Heredity 2

The different forms of a gene are called

• alleles

• phenotypes

• chromosomes

• genotypes

An organism with two identical alleles for a trait is

• heterozygous

• homozygous

• recessive

• dominant

If the body cells of an organism have 10 chromosomes, then the sex cell produced during meiosis would have

• 10 chromosomes

• 5 chromosomes

• 15 chromosomes

• 20 chromosomes

True or False? Mutations in body cells will be passed to offspring.

• true

• false

Tags

NGSS.HS-LS3-2

Which of the following can mutate DNA?

• chemicals

• viruses

• radiation

• all of the above can mutate DNA

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

If an insect's egg cells have 14 chromosomes, how many chromosomes would you expect to find in the cells of the antennae of that insect?

• 7

• 14

• 21

• 28

In this Punnett square, how many offspring do you expect to show the recessive trait?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

How would you describe the parents in this genetic cross?

• Both parents are heterozygous

• One parent is homozygous dominant and one parent is homozygous recessive

• One parent is homozygous dominant and one parent is heterozygous

• One parent is homozygous recessive and one parent is heterozygous

Tags

NGSS.HS-LS3-1

Frosty has black buttons, which is a dominant trait. Crystal his wife has pink buttons, a recessive trait. If Frosty and Crystal are both homozygous, what is the chance of having an offspring with pink buttons?

• 100%

• 75%

• 50%

• 0%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Reindeer with black noses are dominant to reindeer with red noses. What is the chance of having a red-nosed offspring from 2 parents that are heterozygous?

• 100%

• 75%

• 50%

• 25%

Tags

NGSS.HS-LS3-3