Genetics Quiz

Question 1

If a pea plant has a recessive allele for green peas it will produce…

Answer 1

both green peas and yellow peas if irt has a dominant allele for yellow peas

Question 2

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

Answer 2

Both parents were short

Question 3

How many different allele combonations would be found in the gametes produced by a pea plant whos genotype was RrYY

Answer 3

2

Question 4

A male and female bison that are both heterozygous for normal skin pigmentation (Aa) produce an albino offspring (aa) Which of Mendels principles apply?

Answer 4

Dominance and Segregation

Question 5

When one allele is not completely dominant over the another, this is an example of

Answer 5

Incomplete Dominance

Question 6

A cross of a black chicken (BB) with a white chicken (WW) produces all speckled off spring (BBWW) This type of inheritance is called….

Answer 6

Codominance

Question 7

Variation in human skin color is an example of…?

Answer 7

Polygenic Traits

Question 8

Which of the following shows that the environment can affect genetic traits?

a. Oak trees getting taller as they grow
b. Hydrangea flowers color varies with soil pH
c. Dandilion plants are self pollination
d. Pinion trees bear cones every other year

Answer 8

B

Question 9

Gametes have…?

Answer 9

One allele for each gene

Question 10

Which of the following assort independently?

Answer 10

Linked genes

Question 11

The farther apart two genes are located on a chromosome, the

Answer 11

less likely they are to be inherited together

Question 12

what is formed at the end of meiosis?

Answer 12

four genetically different cells

Question 13

What is the phenotype ratio for dihibrids?

Answer 13

9: 3:3:1
9: Dominant, Dominant
3: Dominant, Recessive
3: Recessive, Dominant
1: Recessive, Recessive

Question 14

Due to the process of segregation, alleles separate during the production of what?

Answer 14

Gametes

Question 15

The reddish brown pigment that gives color to a fruit flies eye is controlled by three genes, so a fruit fly’s eye color is a what?

Answer 15

Polygenic Trait

Question 16

What is the difference between segregation and independent assortment?

Answer 16

Every diploid cell has two alleles for every gene. Segregation means that when these alleles go through meiosis to create gametes, they will segregate from one another, and each of the haploid gametes will end up with only one allele.

Independent assortment comes into play when you are looking at how the alleles of two genes separate. As long as each gene lies on a different chromosome, then the alleles of these genes will assort themselves independently of one another when the haploid gametes are formed in meiosis. Each haploid gamete can end up with a different combination of alleles of these two genes.

Question 17

A mule is the result of a cross between a donkey and a horse, a mule is a…

Answer 17

hybrid

Question 18

A tall plant (T) is crossed with a short plant (tt) If the tall pea plant is allowed to self pollinate…

Answer 18

The offspring can be short or tall

Question 19

The principle of probability can be used to…

Answer 19

predict the traits of the offspring of genetic crosses

Question 20

A heterozygous tall plant is crossed with a short plant. The probability that an plant will be tall is…?

Answer 20

50%

Question 21

Organisms that have two identical alleles for a particular trait are said to be what?

Answer 21

Homozygous

Question 22

What principle states that during gamete formation genes for different traits seperate without influencing each others inheritance? What is this?

Answer 22

Principle of independant assortment

Question 23

Variation in human skin color is an example of…?

Answer 23

Polygenic Traits

Question 24

If an organisms dipliod number is 12, its haploid nuimber is what?

Answer 24

6

Question 25

Gametes are prodcuced by the process of…

Answer 25

meiosis

Question 26

Unlike mitosis meiosis results in the formation of…

Answer 26

diploid cells

Question 27

What is formed at the end of meiosis?

Answer 27

For gentically different diploid cells

Question 28

Linked genes are…

Answer 28

on the same chromosome

Question 29

The farther apart two genes are located on a chromosome, the

Answer 29

less likely they are to be seperated by crossing over

Question 30

True or False:
The probability that a gamete produced by a pea plant heterozygous for stem height (Tt) will contain the recessive allele is 100%

Answer 30

False 50%

Question 31

True or False:
A trait in an unidentified plant is controlled by one gene that has two alleles. One allele is dominant over the other. According to medels principles, one fourth of the offsprings made from a cross between two heterozygous plants will show the recessive trait

Answer 31

True

Question 32

Coat color in rabbits is determined by a single gene that has multiple alleles

Answer 32

True

Question 33

The plants that Gregor Mendel crossed the produce the F1 generation made up the ____________ generation

Answer 33

Parent

Question 34

The characterists of a organism is determined by two factors _______ and _____________

Answer 34

genes and enviornment

Question 35

An organisms gametes have ______ the number of chromosomes found in the organisms body

Answer 35

half

Question 36

The relative location of each gene can be shown on a _______ map

Answer 36

gene