Unit 8

Question 1

factors that control traits are called

Answer 1

genes

Question 2

If a homozygous black guinea pig (BB) is crossed with a homozygous white guinea pig (bb), what is the probability that an offspring will have black fur?

Answer 2

100 percent

Question 3

What does codominance mean in genetics?

Answer 3

neither dominant or recessive

Question 4

What happens during meiosis?

Answer 4

chromosomes separate to form new sex cells

Question 5

What is a mutation?

Answer 5

any change in a gene or chromosome

Question 6

Where does protein synthesis take place?

Answer 6

on the ribosome in the cytoplasm of the cell

Question 7

Why are sex-linked traits more common in males than in females?

Answer 7

A recessive allele on the X chromosome will always produce the trait in a male.

Question 8

Which genetic disorder causes the body to produce unusually thick mucus in the lungs and intestines?

Answer 8

cystic fibrosis

Question 9

what has more than 2 variations

Answer 9

multiple alleles

Question 10

phenotypes that is a blend of a heterozygous gene pair

Answer 10

incomplete dominance

Question 11

the genetic code for the gene

Answer 11

genotype

Question 12

trait shows only if both parents pass it on

Answer 12

recessive

Question 13

when you have two different genes

Answer 13

heterozygous

Question 14

when you have two of the same genes

Answer 14

homozygous

Question 15

phenotypes that shows both traits

Answer 15

codominance