Deck 63: Genetics

Question 1

In sex-linked traits, the cells of all offspring contain two copies of the genes for these traits.

Answer 1

False

Question 2

What blood types could the children have, if their mother was type A (Iᴬi)and their father was type B (Iᴮi)?

A)A or B
B)O
C)A, B, AB, or O
D)AB or O
E)A, B, or AB

Answer 2

C

Question 3

Carriers of a recessive trait are always heterozygous for that trait.

Answer 3

True

Question 4

In complete dominance, a dominant gene will be expressed if the person is either homozygous or heterozygous for that trait.

Question 5

The specific combination of alleles that a person inherits for a certain trait is called the

A)locus.
B)phenotype.
C)genome.
D)homologous chromosome.
E)genotype.

Question 6

Astigmatism, a condition in which a defect in the curvature of the cornea or lens produces areas of blurred vision, is an example of a recessive trait.

Question 7

If a person has two different alleles for a particular trait, then the person is ________ for that trait.

A)recessive
B)homozygous
C)codominant
D)dominant
E)heterozygous

Question 8

Colorblindness is an X chromosome-linked, recessive trait.  None of the children of a normal mother (XᶜXᶜ)and a colorblind father (XᶜY)could possibly be colorblind.

Question 9

What do the traits of tongue roller, freckles, and dimples have in common?

A)They all have multiple alleles.
B)They are all recessive traits.
C)They are all inherited by codominance.
D)They are all dominant traits.
E)They are all inherited by incomplete dominance.

Question 10

A male with red-green colorblindness could have received the recessive gene for this condition from either parent.

Question 11

In coin toss experiments, as well as in traits inherited by children in the same family, each event is independent of all others; in other words, chance does not have a memory of previous events.

Question 12

Sex-linked traits are

A)inherited from one of the sex chromosomes.
B)only found in males.
C)inherited from the X chromosome only.
D)only found in females.
E)inherited from the Y chromosome only,

Question 13

Inheritance of the ABO blood group is an example of

A)complete dominance only.
B)incomplete dominance only.
C)sex-linked inheritance only.
D)incomplete dominance and sex-linked inheritance.
E)codominance and multiple alleles.

Question 14

In familial hypercholesterolemia, homozygous people with the abnormal gene have extremely high cholesterol, while heterozygous people have somewhat high cholesterol.  This type of inheritance is called

A)complete dominance.
B)incomplete dominance.
C)multiple alleles.
D)codominance.
E)sex-linked inheritance.

Question 15

If a husband and wife are both carriers of albinism, which is a recessive trait with two alleles, what is the probability that each of their children will be albino?

A)0%
B)25%
C)50%
D)75%
E)100%