final 6

The law of segregation

explains the behavior of a pair of alleles during meiosis.

Homologous chromosomes separate during

Anaphase I

1.5 pts A colorblind man and a woman with normal vision whose father was colorblind have a son. Colorblindness, in this case, is caused by an X-linked recessive gene. If only the male offspring are considered, the probability that their son is colorblind is

0.50 (50 percent).

Down syndrome involves trisomy

21

Meiosis typically results in the production of

4 haploid cells

If a parent cell has 16 chromosomes and undergoes meiosis, the resulting cells will have how many chromosomes?

8

In the eukaryotic cell depicted in Exhibit 9.12, where does transcription occur?

A

In Exhibit 13.4, homologous chromosomes are indicated by

A and B.

Which of the following indicates homozygous genotypes?

AA and aa

Which of the following genotypes show dominant phenotypes?

Aa and AA

In Exhibit 13.4, alleles are indicated by

C, D, E, and F.

1.5 pts Susan, a mother with type B blood, has a child with type O blood. She claims that Craig, who has type A blood, is the father. He claims that he cannot possibly be the father. Further blood tests ordered by the judge reveal that Craig is AA. The judge rules that

Craig is right and doesn't have to pay child support.

In the eukaryotic cell depicted in Exhibit 9.12, what letter identifies the functioning ribosome?

E

In comparing mitosis and meiosis, which of the following statements is true?

Meiosis II resembles mitosis.

Consider the following sentence: "The dog did not eat." Which of the following variations of this sentence is most like a reading frame mutation?

The dod idn ote at.

Consider the following sentence: "The dog did not eat." Which of the following variations of this sentence is most like a base substitution mutation?

The doe did not eat.

The following questions refer to the pedigree chart in Figure 14.2 for a family, some of whose members exhibit the dominant trait, wooly hair. Affected individuals (non- wooly hair) are indicated by an open square or circle.

WW ww

In transcription, _____ is used as a template for the construction of a new RNA molecule.

a segment of one strand of double-stranded DNA

Mutations can be

all of these

Through meiosis

all of these.

If tall (D) is dominant to dwarf (d), and two homozygous varieties DD and dd are crossed, then what kind of offspring will be produced?

all tall

Chromosomes of a pair of homologous chromosomes may differ from each other in terms of

alleles.

If a pure-breeding long-tail cat (LL) is crossed with a pure-breeding cat with no tail (rumpy, ll), and a cat with a short tail (stumpy) is produced, the simplest explanation is

an incompletely dominant gene

At which letter (a), (b), (c), (d), or a combination of letters would you expect to see the more continuous synthesis of DNA (the leading strand)?

b

A chromosome's gene sequence that was ABCDEFG before damage and ABCFG after is an example of

deletion.

Where do transcription and translation occur in prokaryotic cells?

in the cytoplasm

Transcription

is the synthesis of any type of RNA from a DNA template.

Crossing over is one of the most important events in meiosis because

it produces new arrays of alleles on chromosomes.

In asexual reproduction, new combinations of genes arise by

mutation.

Which of the following is(are) frameshift mutations?

one base addition and two base deletion

The term "gene expression" refers to the

process by which genetic information flows from genes to proteins.

Crossing over usually occurs in which of the following stages of meiosis?

prophase I

According to Mendel, what kind of genes "disappear" in F1 pea plants?

recessive

The pedigree below traces the inheritance of alkaptonuria, a biochemical disorder in humans. Affected individuals are indicated by filled-in circles (females) and squares (males). This disease state appears to be caused by a ________ gene, and Susan's genotype is ________ while Jenny's genotype is ________.

recessive; aa; Aa

Which of the following reproductive strategies would allow the most rapid adaptation to a changing environment?

sexual reproduction

Which of the following takes place during translation?

the conversion of genetic information from the language of nucleic acids to the language of proteins

Suppose a hemophilic male (X-linked recessive allele) and a female carrier for the hemophilic trait have a nonhemophilic daughter with Turner syndrome. Nondisjunction could have occurred in

the father only.

Amniocentesis involves sampling

the fetal cells floating in the amniotic fluid.

A person with one copy of a mutated CFTR gene will

to be healthy

A chromosome's gene sequence that was ABCDEFG before modification and ABCDLMNOP afterward is an example of

translocation.

A mammalian female

usually has one Barr body and is a mosaic for the active X chromosome in her cells.