Biol 10 Chapter 8

Front 1

There are NO sugars on the surface of any of the red blood cells for which blood type?

- type O
- type AB
- type A
- type B

Back 1

type O

Front 2

When comparing the DNA fingerprints of a parent and child, the parent's DNA fingerprint will have which of the following genetic traits?

- DNA bands that match those in the child's fingerprint and that aren't from the other parent
- DNA bands that are very close to bands found in the child but do not match precisely
- all of the DNA bands that the child has
- more than half of the DNA bands that the child has

Back 2

DNA bands that match those in the child's fingerprint and that aren't from the other parent

Front 3

A human sperm cell receives autosomes and

- an X chromosome always.
- both an X and a Y chromosome.
- a Y chromosome always.
- either an X or a Y chromosome.

Back 3

either an X or a Y chromosome.

Front 4

If a blue-colored flower crossed with a white-colored flower produced light blue-colored flower offspring, then it's most likely a case of

- codominance.
- sex linkage.
- independent assortment.
- incomplete dominance.

Back 4

incomplete dominance.

Front 5

Hemophilia is an X-linked recessive allele causing a blood disorder. What are the chances that a daughter of a normal man and a woman, who is heterozygous for the disease, will have hemophilia?

- 75%
- 25%
- 0%
- 100%

Back 5

0%

Front 6

The enzyme used to synthesize daughter strands of DNA during PCR is called a ________.

- DNA polymerase.
- Taq polymerase.
- replicase.
- RNA polymerase.

Back 6

Taq polymerase.

Front 7

If a daughter expresses an X-linked recessive gene, she probably inherited the trait from:

- both parents.
- her grandmother.
- neither parent.
- her mother.
- her father.

Back 7

both parents.

Front 8

When the phenotype of a heterozygote is intermediate between both homozygotes, the pattern of inheritance is ________.

- codominance
- independent assortment
- incomplete dominance
- sex linkage

Back 8

incomplete dominance

Front 9

The AB blood type, in which both A and B alleles are expressed, is an example of

- codominance.
- independent assortment.
- sex linkage.
- incomplete dominance.

Back 9

codominance.

Front 10

A child with type O blood could not have a parent with type ________ blood.

- O
- B
- AB
- A

Back 10

AB

Front 11

Y-linked genes include a gene that produces hairy ears. A male with hairy ears should pass this trait

- only to his daughters.
- only to his sons.
- to all his children if the mother is a carrier.
- only to his grandsons.

Back 11

only to his sons.

Front 12

Who is a "carrier" of X-linked disorders, such as hemophilia and color blindness?

- a male carrying the nonfunctioning allele
- a male carrying the functioning allele
- a homozygous female who carries the normal alleles
- a person who has the X-linked disorder
- a heterozygous female who is normal but carries one nonfunctioning allele

Back 12

a heterozygous female who is normal but carries one nonfunctioning allele

Front 13

When does codominance occur?

- a heterozygote expresses an intermediate phenotype
- expression of two different alleles alternates from one generation to the next
- both of the alleles in a heterozygote are expressed phenotypically in an individual
- offspring exhibit several different phenotypic expressions of a single trait

Back 13

both of the alleles in a heterozygote are expressed phenotypically in an individual

Front 14

If a disease is caused by a dominant allele, it means that a person with the disease:

- will always pass it on to all their children.
- could be either homozygous or heterozygous for the allele.
- must be heterozygous for the allele.
- will pass it on to one-fourth of their children.
- must be homozygous dominant for the allele.

Back 14

could be either homozygous or heterozygous for the allele.

Front 15

A normal individual who is a carrier for an X-linked trait such as hemophilia

- is homozygous for the recessive condition.
- cannot have daughters who have the allele.
- shows the recessive phenotype.
- is always female.

Back 15

is always female.

Front 16

Regarding the human sex chromosomes, which statement is correct?

- The X chromosome carries the genes for the development of male phenotype.
- X and Y are different in size but carry nearly equal numbers of genes.
- The X chromosome carries only gender-related genes.
- The X chromosome carries more genes for asexual traits than does the Y.
- The Y chromosome carries a greater number of genes for asexual traits than does the X chromosome.

Back 16

The X chromosome carries more genes for asexual traits than does the Y.

Front 17

Sex-linked traits can be expressed in

- males only.
- carriers only.
- females only.
- either males or females.

Back 17

either males or females.

Front 18

A DNA fingerprint of a suspect doesn't match a DNA fingerprint from a blood sample taken at a crime scene. What can you conclude?

- The suspect was never at the crime scene.
- The blood sample was probably degraded or destroyed in some way.
- The blood came from a different person, but the suspect may have been there.
- There is no DNA in a blood sample.

Back 18

The blood came from a different person, but the suspect may have been there.

Front 19

Describing a person as having hemophilia is to indicate his or her

- phenotype.
- number of chromosomes.
- genotype.
- genetic code.

Back 19

phenotype.

Front 20

Which of the following is used to produce genetic fingerprints of people?

- VNTRs
- Punnett squares
- pedigree analysis
- RNA polymerase

Back 20

VNTRs