Question

1. What are the chances that two heterozygous (Bb) parents will have a dominant expressing

child?

Group of answer choices


25%


50%


75%


100%



2. If a person has a dominant allele for brown eyes and a recessive allele for blue eyes, which

statement is correct?

Group of answer choices


The individual has brown eyes


The individual has blue eyes


The individual has eye color that is a mix of brown and blue


Eye color cannot be determined based on the given information


3. Two parents have webbed toes and are homozygous for the trait. What can be concluded based

ONLY on this information?

Group of answer choices


Their offspring will all have webbed toes.


Only some of their offspring will have webbed toes.


Webbed toes is a dominant trait.


Webbed toes is a recessive trait.


4.The diagram shows a dihybrid cross of two bean plants. Yellow (Y) is the dominant flower color

and smooth (S) is the dominant leaf texture. According to the diagram, what are the chances

that the offspring will have smooth leaves?




Group of answer choices


25%


50%


75%


100%


5.If a cow contains two codominant alleles—one for white hide color and one for red hide color—

what would the cow's hide probably look like?

Group of answer choices


White


Red


Orange


Patches of white and patches of red

Answer 1

1) C 75%

2)A the individual has brown eyes

3) A their offspring will have webbed toes

4) C 75%

5) D patches of white and patches of red

Answer 2

Answer No 1:

The chances of Homozygous dominant (BB) would be 25 percent. 25 percent of the children would be homozygous dominant for the trait. While 75 percent would be heterozygous for the trait.

A punnet square is a diagram which is made to predict the percentage of traits that would be passed from parents to off springs. For a trait to be homozygous dominant both the alleles should be dominant.

Answer No 2:

The correct answer is A. The individual has brown eyes.

A dominant allele can be described one of the two alleles for a gene which masks the effect of the other allele. A recessive allele is the allele which gets masked by the dominant allele.

If a person carries both a dominant and recessive allele, then effect of the dominant allele will be seen. The recessive trait would be masked. Hence, as the dominant allele is for brown eyes, hence the person will have brown eyes.

Answer No 3:

The correct option is A. Their offspring will all have webbed toes.

For a trait to be homozygous, both alleles for that gene should be the same. When a cross will be made of parents having homozygous alleles for a trait, then the same homozygous alleles will be passed to each child. Hence, they will have that trait similar to the parents and would be homozygous for that trait.

Answer No 4:

The correct option is C. 75 % of the offspring plants will have Dominant smooth leaves.

About 25 % percent of the offsprings would be homozygous dominant for this trait.

About 50 percent of the offsprings will be heterozygous dominant for smooth leaves.

Answer No 5:

The correct option is C. Orange

Co dominant alleles re the alleles which do not mask the effects of each other. Hence, a cow having co dominant alleles for white hide colour and red hide colour will not get any of these colours.