Genotypes

Question 1

Codominance

Answer 1

The phenotype is shared by two equal alleles. The dominant allele is unable to mask the recessive allele.

Question 2

Example of codominance

Answer 2

Black and white chicken makes a checkered chicken (mix).

Question 3

Polygenic inheritance

Answer 3

Having many physical traits.

Question 4

Example of polygenic inheritance

Answer 4

Eye color

Question 5

Sex linked traits

Answer 5

When a trait is carried on a sex chromosome .

Question 6

Example of sex linked traits

Answer 6

Color blindness

Question 7

Multiple alleles

Answer 7

When more than 2 alleles exist in a population and not an individual.

Question 8

Example of multiple alleles

Answer 8

The coat color in rabbits it is influenced by a series of multiple alleles.

Question 9

Huntington’s disease

Answer 9

A disease that is passed by heredity . It deteriorates brain cells and causing dementia.

Question 10

Example of Huntington’s disease

Answer 10

The disease happens more with sperm production than egg production. So it’s more likely if a fad has this disease and passes it on to his son.

Question 11

Down syndrome

Answer 11

When chromosome 21 is copied .

Question 12

Incomplete dominance

Answer 12

A heterozygous condition in which both alleles at a gene are partially expressed and which often produces an intermediate phenotype.

Question 13

Example of incomplete dominance

Answer 13

If you had a white rose and crosses it with a red rose you’ll end up with a pink rose.

Question 14

Hemophilia

Answer 14

A condition where the ability to blood clot is badly reduced, causing the sufferer to bleed profusely from even a small injury.

Question 15

Label the following genotype as homozygous or heterozygous

                    BB

Answer 15

Homozygous

Question 16

Label the following genotype as homozygous or heterozygous

                  Ee

Answer 16

Heterozygous

Question 17

Label the following genotype as homozygous or heterozygous

                bb

Answer 17

I think heterozygous

Question 18

Who is Gregory Mendel and what did he study?

Answer 18

A monk who studied pea plants

Question 19

What is a hybrid ?

Answer 19

Mixing two different breeds.

Question 20

What is a gamete ? Lit the name for female and male gametes ?

Answer 20

A Gamete is a sex cell. A female gamete is an egg and the male gamete is sperm .

Question 21

What is a trait ? Give an example of a trait .

Answer 21

A feature of an organism . An example is your ears .

Question 22

What is the difference between mitosis and meiosis ?

Answer 22

Mitosis is one division and meiosis is 2 division

Question 23

What is the outcome of meiosis ?

What is the outcome of mitosis ?

Answer 23

Meiosis = 4 haploid cells
Mitosis = 2 diploid cells

Question 24

How many chromosomes does a human have ? How many pairs ?

Answer 24

23 chromosomes and in total there are 46 pairs in total.

Question 25

What happens during prophase ?

Answer 25

Each chromosome comes near it’s replicated chromosome pair .

Question 26

What happens during metaphase ?

Answer 26

The pairs of homologous chromosomes line up in the center of the cell.

Question 27

What happens during anaphase ?

Answer 27

The homologous chromosome pairs are pulled to opposite ends.

Question 28

What happens during telophase ?

Answer 28

The cytoplasm divides and two cells form .

Question 29

What are the phases of meiosis ?

Answer 29

Interphase, prophase, metaphase, anaphase, telophase .

Question 30

When does crossing over occur ?

Answer 30

In prophase

Question 31

In what phase of meiosis do sister chromatids separate ?

Answer 31

Anaphase 2

Question 32

When a cell contains two of each kind of chromatid, it is called ...

Answer 32

A diploid

Question 33

A persons phenotype can be determined by ....

Answer 33

The genetic makeup of an individual