Chapter 14 - Human Inheritence

Question 1

Constructing a pedigree is useful when studying inheritance patterns in organisms that ___________.

a. produce many offspring per generation
b. produce few offspring per generation
c. have a very large chromosome number
d. reproduce sexually
e. have a fast life cycle

Answer 1

b. produce if you are spring her generation

Question 2

Pedigree analysis is necessary when studying human inheritance patterns because ____________.

a. humans have more than 20,000 genes
b. of ethical problems with experimenting on humans
c. inheritance in humans is more complicated than in other organisms
d. genetic disorders occur in humans
e. all of the above

Answer 2

b. of ethical problems with experimenting on humans

Question 3

A recognized set of symptoms that characterize a genetic disorder is a(n) ______________.

a. syndrome
b. disease
c. abnormality

Answer 3

a. syndrome

Question 4

If one parent is heterozygous for a dominant allele on an autosome and the other parent does not carry the allele, any child of theirs has a _________ chance of being heterozygous.

a. 25%
b. 50%
c. 75%
d. no chance; it will die

Answer 4

b. 50%

Question 5

Is this statement true or false? A son can inherit an X-linked recessive allele from his father.

Answer 5

False

Question 6

A trait that is present in a male child but is not in either of his parents is a characteristic of ___________ inheritance.

a. autosomal dominant
b. autosomal recessive
c. X-linked recessive
d. It is not possible to answer this question without more information.

Answer 6

c. X- linked recessive

Question 7

Color blindness is a case of _________ inheritance.

a. autosomal dominant
b. autosomal recessive
c. X-linked dominant
d. X-linked recessive

Answer 7

d. X-linked recessive

Question 8

What do you think the pattern of inheritance of the human SRY gene is called?

Answer 8

Y linked dominant inheritance

Question 9

A female child inherits one X chromosome from her mother and one from her father. What sex chromosome does a male child inherit from each of his parents?

Answer 9

X from mom and dad

Question 10

Nondisjunction may occur during ____________.

a. mitosis
b. meiosis
c. fertilization
d. both a and b

Answer 10

d. both a and b

Question 11

Nondisjunction can result in _______________.

a. polyploidy
b. aneuploidy
c. crossing over
d. pleiotropy

Answer 11

b. aneuploidy

Question 12

Nondisjunction can occur during _____________ of meiosis.

a. anaphase I
b. telophase I
c. anaphase II
d. a or c

Answer 12

d. a or c

Question 13

Is this statement true or false? Body cells may inherit three or more of each type of chromosome characteristic of the species, a condition called polyploidy.

Answer 13

True

Question 14

Klinefelter syndrome (XXY) can be easily diagnosed by __________.

a. pedigree analysis
b. aneuploidy
c. karyotyping
d. phenotypic treatment

Answer 14

c. karyotyping

Question 15

Match the chromosome terms appropriately.

\_\_\_ polyploidy 
\_\_\_ deletion
\_\_\_ aneuploidy 
\_\_\_ translocation 
\_\_\_ syndrome
\_\_\_ nondisjunction during meiosis

a. symptoms of a genetic disorder
b. segment of a chromosome moves to a nonhomologous chromosome
c. extra sets of chromosomes
d. results in gametes with the wrong chromosome number
e. a chromosome segment lost
f. one extra chromosome

Answer 15

Match the chromosome terms appropriately.

(c) polyploidy
(e) deletion
(f) aneuploidy
(b) translocation
(a) syndrome
(d) nondisjunction during meiosis

a. symptoms of a genetic disorder
b. segment of a chromosome moves to a nonhomologous chromosome
c. extra sets of chromosomes
d. results in gametes with the wrong chromosome number
e. a chromosome segment lost
f. one extra chromosome