Quiz about Punnett Square Practice

Question 1

What is a segment of a DNA strand that codes for a trait?

Accepted Answer

gene

Answer

ribosomes

Answer

osmosis

Answer

cell wall

Question 2

How many copies of each gene do you receive from your parents?

Accepted Answer

2

Answer

0

Answer

1

Answer

3

Question 3

What are the two different versions of the same gene (example: tall or short)?

Accepted Answer

alleles

Answer

chromosomes

Answer

DNA

Answer

mitochondria

Question 4

Capital letters represent ______ alleles.

Accepted Answer

Dominant

Answer

Recessive

Answer

Hidden

Answer

Mutation

Question 5

Lowercase letters represent ______ alleles.

Accepted Answer

Recessive

Answer

Dominant

Answer

Hidden

Answer

Mutation

Question 6

The letter combination (ex: Aa, AA, or aa) is the _________.

Accepted Answer

genotype

Answer

phenotype

Answer

diffusion

Answer

atomic number

Question 7

The traits that can be seen (observed) are the _______.

Accepted Answer

phenotype

Answer

electron cloud

Answer

genotype

Answer

photosynthesis

Question 8

Freckles (F) are dominant to no freckles (f). Which two genotypes represent freckles? Select two.

Accepted Answer

FF

Accepted Answer

Ff

Answer

ff

Question 9

Freckles (F) are dominant to no freckles (f). Which genotype represents no freckles?

Accepted Answer

ff

Answer

FF

Answer

Ff

Question 10

Dimples (D) are dominant to no dimples (d). Which two genotypes represent dimples? Select two.

Accepted Answer

DD

Accepted Answer

Dd

Answer

dd

Question 11

Dimples (D) are dominant to no dimples (d). Which genotype represents no dimples?

Accepted Answer

dd

Answer

DD

Answer

Dd

Question 12

Widow's peak hairline (A) is dominant to straight (a). If a person has the genotype Aa, what would their phenotype be?

Accepted Answer

widow's peak hairline

Answer

straight hairline

Question 13

Widow's peak hairline (A) is dominant to straight (a). If a person has the genotype aa, what would their phenotype be?

Accepted Answer

straight hairline

Answer

widow's peak hairline

Question 14

T - tall and t = short
In the punnett square below, what belongs in the missing square

Accepted Answer

tt

Answer

Tt

Answer

Bb

Answer

TT

Question 15

B = brown fur b = white fur
In the punnett square, what is the probability for white fur?

Accepted Answer

50%

Answer

0%

Answer

25%

Answer

75%

Question 16

Purple is dominant to white for flower color in pea plants. If a purple flowered pea plant (PP) is crossed with a white flowered plant (pp), what color will the offspring be?

Accepted Answer

100% purple

Answer

25% white, 75% purple

Answer

50% white, 50% purple

Answer

100% white

Question 17

Black fur is dominant to yellow fur in Labrador retrievers. If two heterozygous Labradors are crossed, what would the probable fur color of their offspring be?

Accepted Answer

75% black, 25% yellow

Answer

100% black

Answer

100% yellow

Answer

50% yellow, 50% black

Question 18

JoAnne owns a horse ranch with new foals (baby horses). There are three black foals and one chestnut foal. Black coat color (B) is dominant to chestnut coat color (b).

What MOST likely are the genotypes of the parents?

Accepted Answer

Bb x Bb

Answer

BB x BB

Answer

Bb x bb

Answer

BB x Bb

Question 19

Freckles are dominant (F) and no freckles are recessive (f). Two parents' genotypes are crossed and their offspring have a 3/4 chance of having freckles and 1/4 chance of not having freckles. Which Punnett square shows the cross and its offspring?

Accepted Answer

Question 20

Cystic fibrosis is a recessive genetic disorder. If only one gene is present, an individual is a carrier. What is the probability of two healthy cystic fibrosis carriers having a child that has the disease?

Accepted Answer

25%

Answer

75%

Answer

100%

Answer

0%

Punnett Square Practice

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