Unlike Mendel's experiments, when a very tall person and a very short person mate, the children are variable in height. Why is one trait (tall or short) not dominant over the other?

human height is controlled by multiple genes

the gene for height in humans has incomplete dominance

the gene for height has multiple co-dominant alleles

height in not controlled by genes in humans

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

they are on different chromosomes.

they are on the same chromosome

In humans, hemophilia is an X-linked recessive trait. If a man and a woman have a son who is affected with hemophilia, which of the following is definitely true?

The mother carries an allele for hemophilia

The father carries an allele for hemophilia

The father is afflicted with hemophilia

both parents carry an allele for hemophilia

X-linked conditions are more common in men than in women because

Men need to inherit only one copy of the recessive allele for the condition to be fully expressed

The genes associated with the X linked conditions are linked to the X chromosome, which determines maleness.

Women simply do not develop the disease regardless of their genetic composition

The sex chromosomes are more active in men than in women

How would the DNA in a horse muscle cell compare with the DNA in a horse sperm cell?

The sperm cell would have half as much DNA as the muscle cell.

The sperm cell would have twice the DNA as the muscle cell.

The sperm cell and muscle cell would contain the same amount of DNA.

The muscle cell would have four times the DNA as the sperm cell..

What is a karyotype ?

A display of every pair of homologous chromosomes within a cell, organized according to size and shape

The combination of chromosomes found in a gamete

The F 1 offspring of Mendelʹs classic pea cross always looked like one of the two parental varieties because

one phenotype was completely dominant over another.

each allele affected phenotypic expression.

the traits blended together during fertilization.

What was the most significant conclusion that Gregor Mendel drew from his experiments with pea plants?

Traits are inherited in discrete units, and are not the results of ʺblending.ʺ

There is considerable genetic variation in garden peas.

Recessive genes occur more frequently in the F 1 than do dominant ones.

Two plants are crossed, resulting in offspring with a 3:1 ratio for a particular trait. This suggests

that the parents were both heterozygous

that the parents were true-breeding for contrasting traits.

The fact that all seven of the pea plant traits studied by Mendel obeyed the principle of independent assortment most probably indicates which of the following?

All of the genes controlling the traits behaved as if they were on different chromosomes.

None of the traits obeyed the law of segregation.

The diploid number of chromosomes in the pea plants was 7.

When Thomas Hunt Morgan crossed his red-eyed F 1 generation flies to each other, the F 2 generation included both red- and white-eyed flies. Remarkably, all the white-eyed flies were male . What was the explanation for this result?

The gene involved is on the X chromosome.

The gene involved is on the Y chromosome.

The gene involved is on an autosome.

Which of the following statements is true ?

The closer two genes are on a chromosome, the lower the probability that a crossover will occur between them.

The observed frequency of recombination of two genes that are far apart from each other has a maximum value of 100%.

What is the reason that linked genes are inherited together?

They are located close together on the same chromosome.

The number of genes in a cell is greater than the number of chromosomes.

In humans, if a non-disjunction event leads to an individual that is XXY, they would

be male because they have a Y chromosome

be female because they have 2 X chromosomes

have both male and female characteristics

If a particular pedigree follows a sex-linked recessive trait, you would expect to see

an equal number of affected males and females

The red and blue pair of chromosomes in the bottom row are

carrying the same genes, but different alleles

carrying completely different genes

carrying the same genes and the same alleles

Which of the following best explains why the chromosome number is an even number in organisms?

The diploid chromosome number represents pairs of chromosomes, one from ech parent, so that it is always an even number

It is only by coincidence, many organisms have an odd number

The diploid number is always even so that when mitosis occurs each cell gets the same number of chromosmes

Chromosomes double very time the cell divides, so after the first division, the number is always even

Australian shepherd dogs can have a solid coat color (mm) or a mixed pattern coat color called merle (Mm). The homozygous dominant coat color is called a lethal white (MM) which produces pups that are deaf and blind. The Australian Shepherds of America Club discourages from mating two merles. Which of the following best explains why merle-to-merle matings are undesirable?

The cross has a 25% chance of producing homozygous dominant pups.

The cross has the probability of producing litters with 50% solid coat color pups.

The cross produces all homozygous recessive pups

The cross has the probability of producing litters with 25% merle coat pups.

Unit 5 AP Biology : Heredity

Authored by Smitha S

Biology, Science, Specialty

9th - 12th Grade

NGSS covered

Used 37+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If an organism's diploid cells contain 20 chromosomes, its gametes would contain how many?

Tags

NGSS.HS-LS3-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of a gamete?

neuron

chromosome

somatic cell

egg

Tags

NGSS.HS-LS3-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What separates when cells divide in Meiosis 2

Sister Chromatids

Homologous Chromosomes

Analogous Chromosomes

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

A recessive trait will be observed in individuals that are ________ for that trait.

heterozygous

homozygous or heterozygous

homozygous

diploid

Tags

NGSS.HS-LS3-1

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Imagine you are performing a cross involving seed color in garden pea plants. What F₁ offspring would you expect if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over green.

100 percent yellow-green seeds

100 percent yellow seeds

50 percent yellow, 50 percent green seeds

25 percent green, 75 percent yellow seeds

Tags

NGSS.HS-LS3-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _________________ occurs

crossing over

mutagenesis

hybridization

fertilization

Tags

NGSS.HS-LS3-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The observable outward manifestation of the genes of an individual is referred to as its

blueprint

genotype

phenotype

genetic map

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-5

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Unit 5 AP Biology : Heredity

If an organism's diploid cells contain 20 chromosomes, its gametes would contain how many?

Which of the following is an example of a gamete?

What separates when cells divide in Meiosis 2

A recessive trait will be observed in individuals that are ________ for that trait.

Imagine you are performing a cross involving seed color in garden pea plants. What F1 offspring would you expect if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over green.

When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _________________ occurs

The observable outward manifestation of the genes of an individual is referred to as its

Unlike Mendel's experiments, when a very tall person and a very short person mate, the children are variable in height. Why is one trait (tall or short) not dominant over the other?

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

Chromosomes that do NOT play a role in determining the sex of an individual are called

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Imagine you are performing a cross involving seed color in garden pea plants. What F₁ offspring would you expect if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over green.