Which process allows sexually reproducing organisms to create gametes with half the number of...

transcript

Which process allows sexually reproducing organisms to create gametes with half the

number of chromosomes of the body cells?

Meiosis

lization

Reproducti

25% 25%25%25%1. Mitosis2. Meiosis3. Fertilization4. Reproduction

A branch cut off of a geranium plant grows into a new plant. Will the new plant be different

from its parent plant?

because

no, beca

use th

25% 25%25%25%1. yes, because mitosis will take place in the new plant

2. yes, because meiosis will take place in the old plant.

3. no, because meiosis and fertilization did not take place.

4. no, because the new plant was formed from gametes.

Cats have many different possible coat colors. What does this show?

tions occu

duction i..

division of b

tion in s.

25% 25%25%25%1. mutations occurring in sexually reproducing organisms

2. reproduction in asexually reproducing organisms

3. division of body cells in adult organisms

4. variation in sexually reproducing organisms

What is true of asexual reproduction? Offspring that

are identica

mble their.

are quite diff

are random and...

25% 25%25%25%1. are identical to their parents.

2. resemble their parents.

3. are quite different that their parents.

4. are random and can have different results each time.

What is the result of a single cell going through the process of meiosis?

one identica

two id

entical ..

e identica

four g

amete ce...

25% 25%25%25%1. one identical new cell

2. two identical new cells

3. three identical haploid bodies

4. four gamete cells

What is an advantage of asexual reproduction?

the offsp

ring ...

the offsp

ring ...

ore...

are fe

25% 25%25%25%1. the offspring are not identical to their parents

2. the offspring are identical to their parents

3. there are more offspring produced

4. there are fewer offspring produced

Where are genes for sex-linked traits located?

They can be on...

e “Y” c

e “X” c

romoso

me ...

25% 25%25%25%1. They can be on any chromosome

2. On the “Y” chromosome

3. On the “X” chromosome

4. On chromosome pair # 21

A white flower crossed with a red flower produces pink offspring. This is an example of incomplete dominance.

If two of the pink-flowered plants are crossed, what ratio will the genotypes of the offspring have?

1 RR: 3 Rr

1 RR: 2 Rr:

2 Rw: 2 W

3 Rr: 1 rr

25% 25%25%25%

1. 1 RR: 3 Rr2. 1 RR: 2 Rr: 1 rr3. 2 Rw: 2 Ww4. 3 Rr: 1 rr

Why are blood types considered an example of codominance?

are fo

blood type O

blood types A

are th

25% 25%25%25%1. there are four types of blood, not two

2. blood type O can be donated to anyone, AB cannot

3. blood types A and B will both be expressed when present

4. there are three alleles for blood type and four types of blood

How many pairs of homologous chromosomes do humans have?

4 22 46 52

25% 25%25%25%1. 42. 223. 464. 52

If two different alleles are present, which allele is expressed?

Recessi

Dominant

Phenotype

Genotyp

25% 25%25%25%1. Recessive2. Dominant3. Phenotype4. Genotype

A tall pea plant (DD) and a tall pea plant (Dd) have what in common?

Phenotype

Genotyp

Alleles

Seed co

25% 25%25%25%1. Phenotype2. Genotype3. Alleles4. Seed color

In crossing homozygous dominant and homozygous recessive pea plants, Mendel noted that some genes were not seen in the F1 generation and were seen in

only 25% of the F2 generation. What did he call these genes?

Dominant

Recessi

mpletely

25% 25%25%25%

1. Dominant2. Recessive3. Lethal4. Incompletely

dominant

One cat carries heterozygous, long-haired traits (Ss), and its mate carries homozygous short-haired traits (ss). What is the probability of one of their offspring

having long hair?

100%75%

50%25%

25% 25%25%25%1. 100%2. 75%3. 50%4. 25%

A person with phenotype O blood has how many possible genotypes?

6 1 3 2

25% 25%25%25%1. 62. 13. 34. 2

Which pair of chromosomes produces a female offspring?

a female Y ch

a female X ch

25% 25%25%25%1. a female Y chromosome and a male Y chromosome.

2. a female Y chromosome and a male X chromosome.

3. a female X chromosome and a male X chromosome.

4. a female X chromosome and a male Y chromosome.

Crossing a snap dragon that has red flowers with one that has white flowers produces a snap dragon with

pink flowers. The trait for flower color exhibits

Codominance

mplete dom...

ple allel...

Complete domin...

25% 25%25%25%1. Codominance2. Incomplete

dominance3. Multiple alleles4. Complete

dominance

On which of the following chromosomes would a sex-linked trait most likely be

found?

X Y O YO

25% 25%25%25%1. X2. Y3. O4. YO

An organism that has two identical alleles for the same trait is called _______ for that particular trait.

Homozy

Hetero

Dominant

Recessi

codominant

20% 20% 20%20%20%1. Homozygous2. Heterozygous3. Dominant4. Recessive5. codominant

In a heterozygous individual the allele being expressed is

redundant.

dominant.

25% 25%25%25%1. recessive.2. masked.3. redundant.4. dominant.

Let P = purple flowers and p = white, and T = tall plants and t = dwarf. What would be the

appearance of a plant with the genotype PpTt?

purple flowers.

flowers,...

pale purple fl...

20% 20% 20%20%20%1. purple flowers, tall2. purple flowers,

dwarf3. white flowers, tall4. white flowers, dwarf5. pale purple flowers,

intermediate height

One of the main reasons genes sort independent of one another is that

they p

roduce

unrelated ...

they p

roduce

relate

d traits

they a

re on th

e same c.

they a

re diff

erent a

lleles.

they a

re on diff

erent c

20% 20% 20%20%20%1. they produce unrelated traits.

2. they produce related traits.

3. they are on the same chromosome.

4. they are different alleles.5. they are on different

chromosomes.

A single gene has 3 or more alternative forms. These are called

hetero

zygote

ple allel...

homozygotes.

ple zygo

25% 25%25%25%1. heterozygotes.2. multiple alleles.3. homozygotes.4. multiple zygotes.

When Mendel crossed two purple-flowered pea plants with each other, he obtained a

phenotypic ratio of 3:1 (purple pea plants to white pea plants). What are the parents?

homozygous d

hetero

zygous p

hetero

zygous p

25% 25%25%25%1. homozygous dominant purple pea

plant and homozygous recessive white pea plant

2. homozygous dominant purple pea plant and heterozygous white pea plant

3. heterozygous purple pea plant and homozygous dominant purple pea plant

4. heterozygous purple pea plant and heterozygous purple pea plant

As a genetic counselor, you are constructing a human pedigree for a particular disease. You note that every generation shows the trait,

suggesting that it is

inked.

dominant.

cannot d

etermi...

25% 25%25%25%

1. sex-linked.2. recessive.3. dominant.4. cannot determine

from the information provided.

Gregor Mendel worked with what kind or plant?

Peas Corn

25% 25%25%25%1. Peas2. Corn3. Wheat4. Beans

Each alternative form of a gene for a certain trait is called a(n)?

Genotyp

e Alle

Phenotype

Recessi

ve trai...

25% 25%25%25%1. Genotype2. Allele3. Phenotype4. Recessive trait

A woman who has type B blood marries a man who has type A blood. They have five children, all of which have type AB blood. What are the

most probable parental genotypes?

er IBIB, f.

er IBi ,

er IBIB, f.

er IBi, f

25% 25%25%25%

1. mother IBIB, father IAIA

2. mother IBi , father IAi3. Mother IBIB, father

IAi4. mother IBi, father

Which process allows sexually reproducing organisms to create gametes with half the number of...

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