Question 1

An autosome is a ____.

Accepted Answer

A)   chromosome other than a sex chromosome
B)   structure used to transport genetic material to the cytoplasm
C)   chromosome containing a group of genes involved in autoimmune disorders
D)   region of the DNA that is self-replicating
E)   cellular body involved in autoimmune disordersF) A) and B)
G) A) and C)

Question 2

Which individual may be a carrier for a recessive X-linked trait in humans?

Accepted Answer

A)   a homozygous recessive male
B)   a homozygous recessive female
C)   a homozygous dominant female
D)   a heterozygous female
E)   a heterozygous maleF) A) and B)
G) None of the above

Question 3

One mechanism of genomic imprinting silences an allele by DNA ____.

Accepted Answer

A)   methylation
B)   mutation
C)   transposition
D)   deletion
E)   inversionF) A) and B)
G) A) and E)

Question 4

You are observing a number of human uterine cells with a microscope. In the nucleus of each cell, you can see a mass of condensed heterochromatin at one side of the nucleus. Which chromosome is likely to be included in the condensed heterochromatin?

Accepted Answer

A)   a Y chromosome
B)   chromosome 21
C)   an X chromosome
D)   chromosome 5
E)   the Philadelphia chromosomeF) B) and D)
G) C) and D)

Question 5

Match between columns
                        Premises: achondroplasia
sickle-cell anemia
red-green colorblindness
Down syndrome
Duchenne muscular dystrophy
hereditary enamel hydroplasia
progeria
phenylketonuria
cystic fibrosis

Accepted Answer

The Answer of X-linked dominant and autosomal dominant and autosomal is...

Question 6

Which genetic condition has an X-linked recessive inheritance pattern?

Accepted Answer

A)   Duchenne muscular dystrophy
B)   phenylketonuria
C)   achondroplasia
D)   sickle-cell anemia
E)   cystic fibrosisF) A) and B)
G) A) and D)

Question 7

In Drosophila melanogaster, the gene for eye color is located on the X chromosome. The allele for red eye color (Xw+)  is dominant over the allele for white eye color (Xw) . You examine a vial of 100 flies that are all offspring from a single genetic cross. You find both red-eyed females and white-eyed females as well as both red-eyed males and white-eyed males. The genotypes of the parents were ____.

Accepted Answer

A)   Xw+Xw+; XwY
B)   Xw+Xw; XwY
C)   XwXw; Xw+Y
D)   Xw+Xw; Xw+Y
E)   XwXw; XwYF) A) and D)
G) A) and B)

Question 8

A woman with normal blood clotting mates with a man who has hemophilia. Their first child is a boy who has hemophilia. Tests show that the father and son both have the same form of hemophilia, that it is X-linked, and that the boy has normal genetic inheritance. You can predict that if the couple has more children together, it is likely that ____.

Accepted Answer

A)   all of the children will have hemophilia
B)   half of the boys and none of the girls will have hemophilia
C)   none of the other children should have hemophilia
D)   all of the boys and half of the girls will have hemophilia
E)   half of the boys and half of the girls will have hemophiliaF) A) and C)
G) None of the above

Question 9

The principles of linkage and recombination were discovered using which organism?

Accepted Answer

A)   yeast
B)   E. coli
C)   viruses
D)   fruit flies
E)   cattleF) A) and E)
G) All of the above

Question 10

When two genes on the same chromosome are located 10 map units from each other, ____ of the offspring from a testcross for genetic linkage should have a recombinant phenotype.

Accepted Answer

A)   over 75%
B)   about 50%
C)   about 25%
D)   about 10%
E)   about 5%F) A) and B)
G) A) and C)

Question 11

You are working in a research lab on the organism Drosophila melanogaster , and you have been given the job of determining the relative positions of three linked genes for your undergraduate research project. A graduate student in the lab tells you that gene a is 5.0 centimorgans from gene b , and that gene c is 2.7 centimorgans from gene b . What should you do to finish mapping these three genes? What are the likely results that may occur, and how would you interpret such results?

Accepted Answer

To complete this task, you should perfor...

Question 12

If two genes are linked on the same chromosome, then ____.

Accepted Answer

A)   they tend to segregate away from one another during meiosis
B)   the more crossing-over occurs between them
C)   the less crossing-over occurs between them
D)   they tend to segregate away from one another during mitosis
E)   they control the same traitF) C) and D)
G) A) and C)

Exam 13: Genes, Chromosomes, and Human Genetics

When two genes on the same chromosome are located 10 map units from each other, ____ of the offspring from a testcross for genetic linkage should have a recombinant phenotype.

Correct Answer
verified

Which individual may be a carrier for a recessive X-linked trait in humans?

Correct Answer
verified

One mechanism of genomic imprinting silences an allele by DNA ____.

Correct Answer
verified

Choose the mode of inheritance that has been determined for each of the following genetic conditions in humans. Some choices may be used more than once.

Correct Answer
verified

You are observing a number of human uterine cells with a microscope. In the nucleus of each cell, you can see a mass of condensed heterochromatin at one side of the nucleus. Which chromosome is likely to be included in the condensed heterochromatin?

Correct Answer
verified

Correct Answer
verified
To complete this task, you should perfor...
View Answer

Which genetic condition has an X-linked recessive inheritance pattern?

Correct Answer
verified

If two genes are linked on the same chromosome, then ____.

Correct Answer
verified

An autosome is a ____.

Correct Answer
verified

The principles of linkage and recombination were discovered using which organism?

Correct Answer
verified

Correct Answer
verified

Exam 13: Genes, Chromosomes, and Human Genetics

When two genes on the same chromosome are located 10 map units from each other, ____ of the offspring from a testcross for genetic linkage should have a recombinant phenotype.

Correct AnswerverifiedShow Answer

Which individual may be a carrier for a recessive X-linked trait in humans?

Correct AnswerverifiedShow Answer

One mechanism of genomic imprinting silences an allele by DNA ____.

Correct AnswerverifiedShow Answer

Choose the mode of inheritance that has been determined for each of the following genetic conditions in humans. Some choices may be used more than once.

Correct AnswerverifiedShow Answer

You are observing a number of human uterine cells with a microscope. In the nucleus of each cell, you can see a mass of condensed heterochromatin at one side of the nucleus. Which chromosome is likely to be included in the condensed heterochromatin?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedTo complete this task, you should perfor...View AnswerShow Answer

Which genetic condition has an X-linked recessive inheritance pattern?

Correct AnswerverifiedShow Answer

If two genes are linked on the same chromosome, then ____.

Correct AnswerverifiedShow Answer

An autosome is a ____.

Correct AnswerverifiedShow Answer

The principles of linkage and recombination were discovered using which organism?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
To complete this task, you should perfor...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified