Genes on the X chromosome are called ______________. somatic sex-linked epistati

Question

Genes on the X chromosome are called ______________.

somatic

sex-linked

epistatic

autosomal

Question 2

Select one answer.

10 points

The sex of the offspring is determined by _____________.

the mother only

the father only

both the mother and the father

Question 3

Select one answer.

10 points

A gene that encodes an enzyme required for ribose synthesis is found on the X chromosome. Females that are heterozygous for the wild-type and defective mutant allele of this gene will show:

None of their cells will have the enzyme activity since the chromosome with the inactive allele will cause the other X-chromosome to become condensed.

50% of the enzyme activity in their cells, since one allele is inactive.

100% of the enzyme activity in their cells, since the X-chromosome with the inactive gene will be condensed.

50% of their cells will lack enzymatic activity, the other 50% will be active.

Question 4

Select one answer.

10 points

According to the pedigree below, this trait is ____________________.

autosomal dominant

Sex-linked recessive

autosomal recessive

Sex-linked dominant

Question 5

Select one answer.

10 points

A genetic disorder that is sex-linked cannot also be ___________________.

autosomal

recessive

all of these are possible

dominant

Question 6

Select one answer.

10 points

Use the following information to answer the next two questions.

In humans, the condition for normal blood clotting (H) is dominant to hemophilia (h). Suppose William, who has hemophilia, and Linda, who is a carrier for hemophilia, have a son, Mark. What is the probability that Mark will have this condition?

100%

75%

50%

0%

Question 7

Select one answer.

10 points

If William and Linda have a daughter, what is the probability that she will have this condition?

0%

50%

75%

100%

Question 8

Select one answer.

10 points

In humans, how many alleles of genes found on the X chromosome do male have?

0

1

2

4

Question 9

Select one answer.

10 points

What is the genotype of the unshaded individuals in the pedigree below?

aa

Either AA or Aa

Aa

AA

Explanation / Answer

1. Genes on the X chromosome are called sex linked chromosomes.

2. The sex of the offspring is determined by the father only.

3. According to the pedigree below, this trait is Autosomal resessive

4. A genetic disorder that is sex-linked cannot also be All of these are possible

5. In humans, the condition for normal blood clotting (H) is dominant to hemophilia (h). Suppose William, who has hemophilia, and Linda, who is a carrier for hemophilia, have a son, Mark. What is the probability that Mark will have this condition? 50%

6. If William and Linda have a daughter, what is the probability that she will have this condition? 60%

7. In humans, how many alleles of genes found on the X chromosome do male have? 1 allele per gene

8. What is the genotype of the unshaded individuals in the pedigree below? Aa

Related Questions

Navigate

• Browse (All)
• Browse G
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.