In sexual reproduction, how is genetic material inherited from the parents?

Offspring inherit 50% of their genetic material from the mother and 50% from the father.

Offspring are haploid like gametes, receiving all their genetic material from one parent.

Sexual reproduction produces offspring through mitosis, ensuring identical genetic material from both parents.

Budding in sexual reproduction allows offspring to inherit genetic material only from the mother.

Which of the following correctly describes the sequence of events in sexual reproduction?

Gametes are produced through meiosis, and after fertilization, the diploid zygote grows into an organism through mitosis.

Mitosis creates gametes, which then fuse during fertilization to form a haploid zygote that grows through meiosis.

Fertilization occurs first, creating gametes, which then undergo meiosis to develop into a fully grown organism.

A diploid zygote is formed by mitosis, which then divides by meiosis to produce haploid gametes that grow into an organism.

What is the process of crossing over?

The exchange of genetic material between homologous chromosomes during meiosis.

The random separation of homologous chromosomes during mitosis.

The fusion of two gametes to form a zygote.

The replication of DNA to produce identical sister chromatids.

What is the process of independent assortment?

The random distribution of homologous chromosome pairs during meiosis.

The exchange of genetic material between homologous chromosomes during prophase I of meiosis.

The separation of sister chromatids during mitosis to create identical daughter cells.

The fusion of two gametes to form a diploid zygote.

A scientist crosses a red-flowered plant with a white-flowered plant and then allows the offspring to self-pollinate to produce an F2 generation. The results were as follows: 450 red-flowered plants and 150 white-flowered plants (600 total). Which of the following statements correctly describes the relationship of the allele for white petals to the allele for red petals?

The allele for white petals is recessive to the allele for red petals.

The allele for white petals is dominant over the allele for red petals.

The alleles for petal color show incomplete dominance.

The allele for red petals is recessive to the allele for white petals.

Which of the following best defines pleiotropy ?

One gene controls multiple traits.

Multiple genes influence a single trait.

One gene suppresses the expression of another gene.

Two or more genes contribute to the same trait.

Which of the following is an example of polygenic inheritance ?

Multiple genes contributing to skin color in humans.

A single gene controlling flower color in a plant.

One gene determining the shape of an animal’s ears.

One gene affecting multiple traits like eye color and hair color.

One gene masking or suppressing the expression of another gene.

The interaction of multiple genes contributing to a single trait.

A single gene controlling multiple traits.

The effect of environmental factors on gene expression.

Which of the following is an example of pleiotropy ?

A single gene determines both flower color and leaf shape in a plant.

Multiple genes control the height of a person.

Several genes contribute to the development of a human's skin color.

One gene influences the color of a flower, while another gene controls its shape.

Which of the following is an example of polygenic inheritance ?

The skin color of humans is determined by multiple genes.

A single gene controls the color of a cat's fur.

A gene in chickens determines both feather color and feather pattern.

A gene in rabbits determines both fur length and tail shape.

Which of the following is an example of epistasis ?

A gene for fur color in mice can be masked by a gene for fur pattern.

A single gene determines both eye color and hair texture.

Several genes contribute to the shape of a flower.

One gene determines the size of a fruit, while another gene controls its color.

In mice, the allele for black fur (B) is dominant to brown fur (b) , and the allele for a dominant gene (A) suppresses fur color, making the fur white regardless of the other alleles. A cross is made between two mice with the genotypes BbAa and BbAa . What phenotypic ratio of offspring would you expect from this cross?

3 black fur : 1 brown fur : 12 white fur

9 black fur : 3 brown fur : 4 white fur

In snapdragon flowers, the allele for red flowers (R) exhibits incomplete dominance over the allele for white flowers (r) . When a red-flowered snapdragon (RR) is crossed with a white-flowered snapdragon (rr), what is the expected phenotypic ratio of the offspring?

1 red : 2 red and white : 1 white

Which of the following are common methods used to conduct a karyotype on a fetus? (Select all that apply.)

Chorionic Villus Sampling (CVS)

Why are males more affected by X-linked traits than females?

Males have only one X chromosome, so if that X carries a defective allele, they will express the trait.

Males have two X chromosomes, which makes them more resistant to X-linked disorders.

Females have two X chromosomes, which allows them to "correct" the effects of X-linked mutations.

Males are less likely to inherit X-linked traits because they do not inherit the X chromosome from their fathers.

Calico cats have a unique coat color pattern that is determined by X-linked genes. The fur color is controlled by two alleles: O (orange) and B (black), with the O allele being dominant and the B allele being recessive. Since females have two X chromosomes, a calico cat must have one orange allele (O) and one black allele (B) on her X chromosomes. If a calico female cat is crossed with an orange male cat , what are the phenotype possibilities for both male and female offspring?

female: orange or tortoise male: orange or black

female: orange or black male: orange or tortoise

female: tortoise or black male: black only

female: orange or tortoise male: orange only

How do chromosomal disorders such as Trisomy 21 (Down syndrome) , Trisomy 18 (Edwards syndrome) , or Trisomy 13 (Patau syndrome) typically occur?

They are caused by nondisjunction during meiosis.

They occur due to a mutation in a single gene.

They result from environmental factors affecting fetal development.

They are caused by a deletion of specific chromosomes.

How can sunlight impact the phenotype of human skin color?

Sunlight triggers the production of melanin, darkening the skin.

Sunlight causes a genetic mutation in skin color genes.

Sunlight has no effect on skin color.

Sunlight can alter the DNA sequence of skin color genes.

Which of the following is an example of how the environment can affect the phenotype of an organism?

Temperature-dependent sex determination in sea turtles

The color of a flower determined by a dominant allele

The presence of a genetic mutation that causes a disease

The inheritance of blood type in humans

Unit 5 Review

Authored by Bethany Roberts

Biology

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which is an example of asexual reproduction

mitosis

meiosis

Which of the following is an essential process involved in sexual reproduction?

mitosis

meiosis

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If this diploid cell where to undergo asexual reproduction, how many chromosomes would the daughter cells contain?
2n=12

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which ploidy are gametes?

haploid

diploid

triploid

tetroid

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Fill in the blank: In MEIOSIS the parent cell is and produces daughter cells

diploid; 4; haploid

haploid; 2; diploid

haploid; 4; diploid

diploid; 2; diploid

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Fill in the blank: In MITOSIS the parent cell is and produces daughter cells

diploid; 4; haploid

haploid; 2; diploid

haploid; 4; diploid

diploid; 2; diploid

If the parent cell in MEIOSIS contains 16 chromosomes, how many chromosomes will each daughter cell have?

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Unit 5 Review

Which is an example of asexual reproduction

Which of the following is an essential process involved in sexual reproduction?

If this diploid cell where to undergo asexual reproduction, how many chromosomes would the daughter cells contain?2n=12

Which ploidy are gametes?

Fill in the blank: In MEIOSIS the parent cell is ____________ and produces ________ ____________ daughter cells

Fill in the blank: In MITOSIS the parent cell is ____________ and produces ________ ____________ daughter cells

If the parent cell in MEIOSIS contains 16 chromosomes, how many chromosomes will each daughter cell have?

In sexual reproduction, how is genetic material inherited from the parents?

Which of the following correctly describes the sequence of events in sexual reproduction?

A _________ zygote is formed through the fusion of ___________ gametes (sperm & egg) during fertilization.

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If this diploid cell where to undergo asexual reproduction, how many chromosomes would the daughter cells contain?
2n=12

Fill in the blank: In MEIOSIS the parent cell is and produces daughter cells

Fill in the blank: In MITOSIS the parent cell is and produces daughter cells

A _ zygote is formed through the fusion of ___ gametes (sperm & egg) during fertilization.