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Meiosis and Genetics

Total questions: 35

Worksheet time: 22mins

Name
Class
Date
1.

What is the top left arrow pointing to?

a)

Homozygous dominant

b)

Heterozygous

c)

Homozygous recessive

d)

heterozygous dominant

2.

According to the Punnett square in basic mendelian genetics: B reprepsents the dominant gene for blue feathers and b represents the recessive gene for red feathers. Two heterozygous birds have one offspring. What percent chance does it have for red feathers?

a)

0%

b)

25%

c)

75%

d)

100%

3.

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

a)

hybrid.

b)

homozygous.

c)

heterozygous.

d)

dominant.

4.

Unlike mitosis, meiosis results in the formation of

a)

two genetically identical cells.

b)

four genetically identical cells.

c)

four genetically different cells.

d)

four genetically identical cells.

5.

In alleles, capital letters show:

a)

Recessive traits.

b)

Dominant traits.

6.

Heterozygous means:

a)

Same alleles. Ex: TT

b)

Different alleles. Ex: Tt

7.

What is true about genotypes?

a)

Genotypes are the physical traits

b)

Genotypes are the allele combinations.

8.

Phenotypes refer to:

a)

Allele combinations.

b)

Physical Characteristics.

9.

Study the Punnett Square. What is the probability of a dominant trait showing up?

a)

0%

b)

25%

c)

50%

d)

100%

10.

What is the final result in meiosis?

a)

Two new daughter cells with the exact same chromosomes.

b)

Four new cells, each with half the chromosomes.

c)

Four new cells, each with twice the chromosomes.

11.

True or False: Meiosis is responsible for genetic variation.

a)

True

b)

False

12.

An organism's physical appearance, or visible traits.

a)

genotype

b)

phenotype

c)

heterozygous

d)

homozygous

13.

Term used to describe the genetics of an organism which has purebred allele's for a trait

a)

homozygous

b)

heterozygous

c)

hybrid

d)

spongebob

14.

An organism or cell having only one complete set of chromosomes.

a)

diploid

b)

haploid

c)

allele

d)

mitosis

15.

Two or more alternate versions of the same gene found in the same location on a chromosome.

a)

chromatids

b)

mitosis

c)

allele

d)

heterozygous

16.

If the genotype of an individual shows two different alleles it is called:

a)

homozygous

b)

heterozygous

c)

codominant

d)

segregation

17.

What "father of genetics" experimented with peas to identify heredity patterns?

a)

Watson

b)

Crick

c)

Franklin

d)

Mendel

18.
A section on a chromosome that has genetic information for one trait is called a
a)
gene
b)
allele
c)
phenotype
d)
genotype
19.

Which Genotype is Recessive?

a)

aa

b)

AA

c)

Aa

d)

None of the abvoe

20.
Body cells have diploid or haploid number of chromosomes?
a)
Haploid
b)
Diploid
21.
What is a recessive allele?
a)
A trait that is always shown (capital letter)
b)
A trait that can be hidden (lower case letter)
c)
Alleles that are the same
d)
Alleles that are different
22.

Sperm and eggs are considered

a)

sex chromosomes

b)

autosomes

c)

sex cells

d)

somatic cells

23.

Body cells are also known as

a)

sex cells

b)

gametes

c)

somatic cells

d)

autosomes

24.

The process of meiosis results in

a)

diploid cells

b)

haploid cells

c)

eggs and sperm

d)

autosomes

25.

This is a karyotype of a

a)

female

b)

male

26.

There are 22 autosomes and 1 sex chromosome in a

a)

human somatic cells

b)

human hair cells

c)

human egg cell

d)

human blood cell

27.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
28.

How many children will have Brown Eyes (B)?

a)

1

b)

2

c)

3

d)

4

29.
What is it called when a sperm and egg meet?
a)
meiosis
b)
fertilization
c)
cell division
d)
mitosis
30.
Meiosis makes sperm and egg cells. In humans, sperm and egg cells each have _____ chromosomes. Therefore a fertilized human egg cell (sperm and egg cell combined) would create a cell with _____ chromosomes.
a)
23, 46
b)
46, 23
c)
2, 4
d)
50, 100
31.
What causes genetic variation in meiosis?
a)
chromosomes lining up
b)
crossing over of chromosomes
c)
separation of chromosomes
d)
chromosomes pulling apart
32.
When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _________________ occurs
a)
crossing over
b)
mutagenesis
c)
hybridization
d)
fertilization
33.
Diploid Cells are represented by
a)
2n
b)
n
c)
4n
d)
1/2 n
34.
Which process and type of resulting cells are represented?
a)
mitosis, gametes
b)
mitosis, body cells
c)
meiosis, gametes
d)
meiosis, body cells
35.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%