Biology Chapter 11 Genetics

Question 1

Organisms that have identical alleles for a particular trait are called

Accepted Answer

homozygous.

Question 2

If the red and white flowers are the parents, which of principle of genetics does this reflect?

Accepted Answer

Incomplete Dominance.

Question 3

An organism possessing the alleles ff for freckles would be considered

Accepted Answer

homozygous.

Question 4

The principle of dominance states that

Accepted Answer

some alleles are dominant and others are recessive

Question 5

Gregor Mendel's principles of genetics applies to

Accepted Answer

all organisms

Question 6

What does the term "homologous" mean?

Accepted Answer

Having the same genes at the same place on a chromosome.

Question 7

The principles of probability can be used to

Accepted Answer

predict traits of the offspring produced by genetic crosses

Question 8

What is the approximate probability that a human offspring will be male?

Accepted Answer

50%

Question 9

How many different allele combinations are found in the gametes with genotype RrYy?

Accepted Answer

4

Question 10

What is a gamete?

Accepted Answer

An egg or sperm.

Question 11

A Tt pea plant is crossed with a short plant. the probability that an F1 plant will be tall

Accepted Answer

50%

Question 12

The offspring of crosses between different parents are called

Accepted Answer

hybrids.

Question 13

If a pea plant's alleles for height are tt, what is true of its parents?

Accepted Answer

both parents contributed a recessive allele

Question 14

A specific characteristic, such as color or size, is called

Accepted Answer

a trait.

Question 15

What will the genotype and phenotype be for the offspring in the gray shaded area?

Accepted Answer

rrYy; wrinkled/yellow

Question 16

When Mendel crossed the F1 generation peas, he found that the recessive trait had disappeared.

Accepted Answer

False.

Question 17

Gregor Mendel concluded that traits are

Accepted Answer

inheritedby the passing of factors from parents to offspring

Question 18

When Mendel crossed a tall plant with a short plant, the F1 plants inherited

Accepted Answer

tall allele from 1 parent & allele for short from 1 parent

Question 19

What is the difference between a genotype and a phenotype?

Accepted Answer

Genotypes are alleles, phenotypes are traits.

Question 20

True breeding produces

Accepted Answer

offspring with identical DNA.

Question 21

In the F2 generation short plants reappeared because

Accepted Answer

allele for short&tall segregated when F1 plants made gametes

Question 22

Each pea-plant has how many alleles for the height gene?

Accepted Answer

2

Question 23

What was the genotype of the parents of these 16 offspring?

Accepted Answer

RrYy.

Question 24

Which of the following best summarizes the law of independent assortment?

Accepted Answer

Traits on genes segregate during gamete formation.

Question 25

What is the probability of rolling a dice and landing on 1?

Accepted Answer

1/6

Question 26

The likelihood that a particular event will occur is referred to as

Accepted Answer

Probability.

Question 27

Where are chromosomes found?

Accepted Answer

In the nucleus.

Question 28

The different forms of a gene contributed by each parent is called

Accepted Answer

an allele.

Question 29

Variation in skin color is a result of

Accepted Answer

polygenic traits

Question 30

Is it possible to have the same phenotype with another person, but a different genotype?

Accepted Answer

Yes.

Question 31

Which principle of genetics does this organism reflect?

Accepted Answer

Codominance.

Question 32

What is the probability of flipping a coin 3 times and landing on heads 3 times in a row?

Accepted Answer

1/8

Biology Chapter 11 Genetics

Questions 32

Biology Chapter 11 Genetics

Questions 32