Dihybrid Crosses 2024

Last updated almost 2 years ago

25 questions

1

Use the chart below to identify the phenotype of a snail with the genotype WwPpbb

white shell white skin big eyes

black shell white skin small eyes

white shell pink skin small eyes

black shell pink skin small eyes

Use the chart to determine the genotype of a snail that is recessive for shell color, heterozygous for skin color, and homozygous dominant for eyes.

WWPPBB

wwPpBB

WwPpBb

wwPpbb

1

Draw the cross between a snail that is heterozygous for white shell and a snail with a black shell (homozygous recessive).

Remember
W= white
w=black

1

Draw the cross between two snails that are heterozygous for pink skin.

Remember
P=pink
p=white

1

A scientists is studying the inheritance of two genes, gene B and gene H, in dogs. Each gene is located on a different chromosome. Gene B has two alleles, B and b, and gene H has two alleles, H and h. What are the expected probabilities for the genotypes of gametes produced by a dog with the genotype BbHh?

50% Bh and 50% Hh

50% BH and 50% bh

50% Bh, 25% bH, and 25% bh

25% BH, 25% Bh, 25% bH, and 25% bh

Blue body color (B) is dominant to purple body color (b). Round eyes (R) is dominant to oval eyes (r). How many offspring in the cross will be blue with round eyes (B_R_).

1 out of 16

3 out of 16

9 out of 16

12 out of 16

Blue body color (B) is dominant to purple body color (b). Round eyes (R) is dominant to oval eyes (r). How many offspring in the cross will be blue with oval eyes (Bbrr or BBrr)?

1 out of 16

3 out of 16

9 out of 16

12 out of 16

Blue body color (B) is dominant to purple body color (b). Round eyes (R) is dominant to oval eyes (r). How many offspring in the cross will be purple with round eyes?

1 out of 16

3 out of 16

6 out of 16

16 out of 16

Blue body color (B) is dominant to purple body color (b). Round eyes (R) is dominant to oval eyes (r). How many offspring in the cross will be purple with oval eyes?

None

1 out of 16

2 out of 16

6 out of 16

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the phenotype of BbLl?

blue eyes long nose

blue eyes stubby nose

purple eyes long nose

purple eyes stubby nose

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the phenotype of bbLl?

blue eyes long nose

blue eyes stubby nose

purple eyes long nose

purple eyes stubby nose

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the phenotype of Bbll?

blue eyes long nose

blue eyes stubby nose

purple eyes long nose

purple eyes stubby nose

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the phenotype of bbll?

blue eyes long nose

blue eyes stubby nose

purple eyes long nose

purple eyes stubby nose

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the probability that the baby will have blue eyes with a stubby nose?

9/16

3/16

4/16

1/16

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the probability that the baby will be purple eyes with a stubby nose?

9/16

3/16

4/16

1/16

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the probability that the baby will be blue eyes with a long nose?

9/16

3/16

4/16

1/16

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the probability that the baby will be blue eyes with a stubby nose?

9/16

3/16

4/16

1/16

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the probability that the baby will have purple eyes?

8/16

10/16

4/16

3/16

Use the chart below to identify the phenotype of a snail with the genotype WwPpbb

white shell white skin big eyes

black shell white skin small eyes

white shell pink skin small eyes

black shell pink skin small eyes

Use the chart to determine the genotype of a snail that is recessive for shell color, heterozygous for skin color, and homozygous dominant for eyes.

WWPPBB

wwPpBB

WwPpBb

wwPpbb

Look at #16 What percent of the offspring will have a white shell?

100%

75%

50%

25%

Look at #18, What is the phenotypic ratio.

2:2

4:0

3:1

R= red r= yellow
F= round f= pear shaped
What is the phenotype of a fruit that is RrFf?

red and round

red and pear shaped

yellow and round

yellow and pear shaped

R= red r= yellow
F= round f= pear shaped

Considering only fruit color, how many of the offspring will be red?

16/16

12/16

9/16

3/16

R= red r= yellow
F= round f= pear shaped

Considering only shape, how many of the offspring will be round?

16/16

12/16

9/16

3/16

R= red r= yellow
F= round f= pear shaped

How many of the offspring will be yellow and round?

R= red r= yellow
F= round f= pear shaped

How many of the offspring will be yellow and pear shaped?

A scientists is studying the inheritance of two genes, gene B and gene H, in dogs. Each gene is located on a different chromosome. Gene B has two alleles, B and b, and gene H has two alleles, H and h. What are the expected probabilities for the genotypes of gametes produced by a dog with the genotype BbHh?

50% Bh and 50% Hh

50% BH and 50% bh

50% Bh, 25% bH, and 25% bh

25% BH, 25% Bh, 25% bH, and 25% bh

Blue body color (B) is dominant to purple body color (b). Round eyes (R) is dominant to oval eyes (r). How many offspring in the cross will be blue with round eyes (B_R_). 

1 out of 16

3 out of 16

9 out of 16

12 out of 16

Blue body color (B) is dominant to purple body color (b). Round eyes (R) is dominant to oval eyes (r). How many offspring in the cross will be blue with oval eyes (Bbrr or BBrr)?

1 out of 16

3 out of 16

9 out of 16

12 out of 16

Blue body color (B) is dominant to purple body color (b). Round eyes (R) is dominant to oval eyes (r). How many offspring in the cross will be purple with round eyes?

1 out of 16

3 out of 16

6 out of 16

16 out of 16

Blue body color (B) is dominant to purple body color (b). Round eyes (R) is dominant to oval eyes (r). How many offspring in the cross will be purple with oval eyes?

None

1 out of 16

2 out of 16

6 out of 16

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the phenotype of BbLl?

blue eyes long nose

blue eyes stubby nose

purple eyes long nose

purple eyes stubby nose

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the phenotype of bbLl?

blue eyes long nose

blue eyes stubby nose

purple eyes long nose

purple eyes stubby nose

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the phenotype of Bbll?

blue eyes long nose

blue eyes stubby nose

purple eyes long nose

purple eyes stubby nose

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the phenotype of bbll?

blue eyes long nose

blue eyes stubby nose

purple eyes long nose

purple eyes stubby nose

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the probability that the baby will have blue eyes with a stubby nose?

9/16

3/16

4/16

1/16

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the probability that the baby will be purple eyes with a stubby nose?

9/16

3/16

4/16

1/16

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the probability that the baby will be blue eyes with a long nose?

9/16

3/16

4/16

1/16

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the probability that the baby will be blue eyes with a stubby nose?

9/16

3/16

4/16

1/16

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the probability that the baby will have purple eyes?

8/16

10/16

4/16

3/16

Look at #16 What percent of the offspring will have a white shell?

100%

75%

50%

25%

Look at #18, What is the phenotypic ratio.

2:2

4:0

3:1

R= red           r= yellow
F= round        f= pear shaped
What is the phenotype of a fruit that is RrFf?

red and round

red and pear shaped

yellow and round

yellow and pear shaped

R= red           r= yellow
F= round        f= pear shaped

Considering only fruit color, how many of the offspring will be red?

16/16

12/16

9/16

3/16

R= red           r= yellow
F= round        f= pear shaped

Considering only shape, how many of the offspring will be round?

16/16

12/16

9/16

3/16

R= red           r= yellow
F= round        f= pear shaped

How many of the offspring will be yellow and round?

16/16

12/16

9/16

3/16

1/16

R= red           r= yellow
F= round        f= pear shaped

How many of the offspring will be yellow and pear shaped?

16/16

12/16

9/16

3/16

1/16

Dihybrid Crosses 2024

Dihybrid Crosses 2024

Draw the cross between a snail that is heterozygous for white shell and a snail with a black shell (homozygous recessive). Remember W= whitew=black

Draw the cross between two snails that are heterozygous for pink skin.RememberP=pinkp=white

Use the chart below to identify the phenotype of a snail with the genotype WwPpbb

Use the chart to determine the genotype of a snail that is recessive for shell color, heterozygous for skin color, and homozygous dominant for eyes.

Draw the cross between a snail that is heterozygous for white shell and a snail with a black shell (homozygous recessive). Remember W= whitew=black

Draw the cross between two snails that are heterozygous for pink skin.RememberP=pinkp=white

Blue body color (B) is dominant to purple body color (b). Round eyes (R) is dominant to oval eyes (r). How many offspring in the cross will be blue with round eyes (B_R_).

Blue body color (B) is dominant to purple body color (b). Round eyes (R) is dominant to oval eyes (r). How many offspring in the cross will be blue with oval eyes (Bbrr or BBrr)?

Blue body color (B) is dominant to purple body color (b). Round eyes (R) is dominant to oval eyes (r). How many offspring in the cross will be purple with round eyes?

Blue body color (B) is dominant to purple body color (b). Round eyes (R) is dominant to oval eyes (r). How many offspring in the cross will be purple with oval eyes?

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the phenotype of BbLl?

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the phenotype of bbLl?

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the phenotype of Bbll?

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the phenotype of bbll?

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the probability that the baby will have blue eyes with a stubby nose?

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the probability that the baby will be purple eyes with a stubby nose?

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the probability that the baby will be blue eyes with a long nose?

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the probability that the baby will be blue eyes with a stubby nose?

Long nose (L) is dominant to stubby nose (l). Blue eyes (B) are dominant to purple eyes (b). What is the probability that the baby will have purple eyes?

Look at #16 What percent of the offspring will have a white shell?

Look at #18, What is the phenotypic ratio.

R= red r= yellowF= round f= pear shapedWhat is the phenotype of a fruit that is RrFf?

R= red r= yellowF= round f= pear shapedConsidering only fruit color, how many of the offspring will be red?

R= red r= yellowF= round f= pear shapedConsidering only shape, how many of the offspring will be round?

R= red r= yellowF= round f= pear shapedHow many of the offspring will be yellow and round?

R= red r= yellowF= round f= pear shapedHow many of the offspring will be yellow and pear shaped?

Draw the cross between a snail that is heterozygous for white shell and a snail with a black shell (homozygous recessive).

Remember
W= white
w=black

Draw the cross between two snails that are heterozygous for pink skin.

Remember
P=pink
p=white

Draw the cross between a snail that is heterozygous for white shell and a snail with a black shell (homozygous recessive).

Remember
W= white
w=black

Draw the cross between two snails that are heterozygous for pink skin.

Remember
P=pink
p=white

R= red r= yellow
F= round f= pear shaped
What is the phenotype of a fruit that is RrFf?

R= red r= yellow
F= round f= pear shaped

Considering only fruit color, how many of the offspring will be red?

R= red r= yellow
F= round f= pear shaped

Considering only shape, how many of the offspring will be round?

R= red r= yellow
F= round f= pear shaped

How many of the offspring will be yellow and round?

R= red r= yellow
F= round f= pear shaped

How many of the offspring will be yellow and pear shaped?