Question #1

TextMultipleChoice

Red-flowered snapdragons are crossed with white-flowered snapdragons, producing all pink snapdragons in the F1 generation. What would you expect if you crossed pink with pink? red, pink, white.

Question #2

MultipleChoice

Which symbols (genotypes) are involved in the cross to produce the F2 generation of pink flowers?

RR x rr

Rr x rr

Rr x Rr

rr x rr

Question #3

MultipleChoice

Traits that are sex-linked are carried on _____.

either the X or Y chromosome

the Y chromosome

the X chromosome

Question #4

MultipleChoice

When the blending of traits occurs, it is referred to as the principle of _____.

heredity

complete dominance

incomplete dominance

hybridization

Question #5

MultipleChoice

The phenotypic ratio for the F2 generation in a dihybrid cross will theoretically be _____.

1:2:1

1:3

9:3:3:1

1:2:2:1

Question #6

TextMultipleChoice

If one parent is heterozygous white (Ww) and the other is homozygous black (ww), give the phenotype and genotype ratios for this cross.

Phenotype:

Genotype ratio Ww:ww

Question #7

TextMultipleChoice

A cross involving purebred, red snapdragons and purebred, white snapdragons produce all pink offspring because both genes are present, neither being over the other, resulting in the of the trait.

Question #8

TrueFalse

Heterozygous genes will always display a dominant trait.

True

False

Question #9

TextMultipleChoice

In a dihybrid cross, the F2 will have nine genotypes, but only four phenotypes because the genes cause the traits to mask the traits.

Question #10

TextMultipleChoice

A student analyzed ears of corn that demonstrated two traits in the F2 kernels, purple or white colors and smooth or wrinkled shapes. A tabulation of 135 individual kernels gave the following results:

purple and smooth = 75

white and smooth = 28

purple and wrinkled = 24

white and wrinkled = 8

The alleles are dominant.

Question #11

Matching

Match the following terms and definitions.

1. breeding of individuals that have genes for two different characteristics incomplete dominance

2. a grid system used to predict possible combinations of genes due to random fertilization multiple alleles

3. a condition in which both alleles are dominant codominance

4. when more than two alternatives exist for a gene dihybrid cross

5. a condition in which neither pair of alleles is dominant or recessive, so the traits blend in the phenotype Punnett square

Question #12

MultipleSelect

According to the following Punnett square, the female genotype is _____.

TT

Tt

tt

homozygous

heterozygous

Question #13

MultipleChoice

A student analyzed ears of corn that demonstrated two traits in the F2 kernels, purple or white colors and smooth or wrinkled shapes. A tabulation of 135 individual kernels gave the following results:

purple and smooth = 75

white and smooth = 28

purple and wrinkled = 24

white and wrinkled = 8

How many phenotypes are present?

2

3

4

6

Question #14

MultipleChoice

A student analyzed ears of corn that demonstrated two traits in the F2 kernels, purple or white colors and smooth or wrinkled shapes. A tabulation of 135 individual kernels gave the following results:

purple and smooth = 75

white and smooth = 28

purple and wrinkled = 24

white and wrinkled = 8

What would be the only phenotype present in the F1 generation?

purple and smooth

white and smooth

purple and wrinkled

white and wrinkled