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Worksheets

Heredity

Total questions: 36

Worksheet time: 12mins

Name
Class
Date
1.

The shown trait of an organism

a)

genotype

b)

phenotype

c)

dominant allele

d)

recessive allele

2.

An allele that always shows when present in the genotype

a)

dominant

b)

recessive

c)

homozygous

d)

heterozygous

3.

The "hidden" allele in a heterozygous genotype.

a)

dominant

b)

recessive

c)

homozygous

d)

capital letter

4.

The gene combination of an organism that determines the shown trait.

a)

genotype

b)

phenotype

c)

homozygous dominant

d)

homozygous recessive

5.

What are the sex cells of an organism that reproduces sexually called?

a)

diploid

b)

body cells

c)

gametes.

d)

cytokinesis

6.

When does crossing over happen?

a)

Interphase

b)

Meiosis I

c)

Meiosis 2

d)

Cytokinesis

7.

When does the cell split into 2 separate cells?

a)

Interphase

b)

Meiosis I

c)

Meiosis 2

d)

Cytokinesis

8.

When do the paired chromosomes (homologs) separate?

a)

Interphase

b)

Meiosis I

c)

Meiosis 2

d)

Cytokinesis

9.

When do the chromatids split apart into individual chromosomes?

a)

Interphase

b)

Meiosis I

c)

Meiosis 2

d)

Cytokinesis

10.

When does the DNA replicate?

a)

Interphase

b)

Meiosis I

c)

Meiosis 2

d)

Cytokinesis

11.

When do the centrioles duplicate?

a)

Interphase

b)

Meiosis I

c)

Meiosis 2

d)

Cytokinesis

12.

If a heterozygous parent is crossed with a homozygous recessive parent, what are the probabilities of producing a homozygous dominant offspring?

a)

0%

b)

25%

c)

50%

d)

75%

e)

100%

13.

Green is dominant to red. If a heterozygous parent is crossed with a homozygous recessive parent, what are the probabilities of producing a red offspring?

a)

0%

b)

25%

c)

50%

d)

75%

e)

100%

14.

Green is dominant to red. If a heterozygous parent is crossed with a homozygous recessive parent, what are the probabilities of producing a green offspring?

a)

0%

b)

25%

c)

50%

d)

75%

e)

100%

15.

Green is dominant to red. If a heterozygous parent (P1) is crossed with a homozygous recessive parent (P2), what is the genotype of P1?

a)

GG

b)

Gg

c)

gg

d)

Gr

16.

If an flowering plant has 32 chromosomes in each leaf cell, how many chromosomes would be in a stem cell?

a)

8 chromosomes

b)

16 chromosomes

c)

32 chromosomes

d)

64 chromosomes

17.

If an flowering plant has 32 chromosomes in each leaf cell, how many chromosomes would be in a gamete cell?

a)

8 chromosomes

b)

16 chromosomes

c)

32 chromosomes

d)

64 chromosomes

18.

Creating unique sex cells is the main purpose of which process?

a)

mitosis

b)

meiosis

c)

cytokinesis

d)

interphase

19.

Who determines the gender of offspring in sexually reproducing organisms?

a)

baby doctor

b)

female parent

c)

male parent

d)

nobody knows the answer to this mystery

20.

After meiosis and cytokinesis are complete, which of the following is TRUE?

a)

2 identical cells will be formed

b)

2 unique cells will be formed

c)

4 unique cells will be formed

d)

8 identical cells will be formed

21.

What is the term for a cell that contains two sets of chromosomes?

a)

haploid

b)

diploid

c)

zygote

d)

gamete

22.

During which phase of meiosis do homologous chromosomes exchange genetic material?

a)

Interphase

b)

Meiosis I

c)

Meiosis II

d)

Cytokinesis

23.

What is the probability of producing a heterozygous offspring when two heterozygous parents are crossed?

a)

0%

b)

75%

c)

25%

d)

50%

e)

100%

24.

What is the genotype of a homozygous dominant parent?

a)

Gg

b)

gg

c)

Gr

d)

GG

25.

Which process results in the formation of gametes with half the number of chromosomes?

a)

cytokinesis

b)

meiosis

c)

interphase

d)

mitosis

26.

What is the term for an organism with two identical alleles for a trait?

a)

heterozygous

b)

homozygous

c)

genotype

d)

phenotype

27.

What is the probability of producing a homozygous recessive offspring when two heterozygous parents are crossed?

a)

75%

b)

50%

c)

100%

d)

25%

e)

0%

28.

Which phase of meiosis results in the separation of sister chromatids?

a)

Meiosis II

b)

Meiosis I

c)

Interphase

d)

Cytokinesis

29.

What is the genotype of a homozygous recessive parent?

a)

GG

b)

Gr

c)

gg

d)

Gg

30.

What part of cell division is this image? Hint: you are starting to see the nuclear membrane again!

a)

Interphase

b)

beginning of Meiosis I

c)

end of Meiosis I

31.

What part of cell division is this?


Hint: nuclear membrane is disappearing

a)

Interphase

b)

Meiosis I

c)

Meiosis 2

d)

Cytokinesis

32.

What part of cell division is this?

a)

Interphase

b)

Meiosis I

c)

Meiosis 2

d)

Cytokinesis

33.
What process is shown here?
a)
Genetic Randomization
b)
Cross Over
c)
Allele Switching
d)
Cross Pollination
34.
When does the process shown here happen?
a)

Interphase

b)

Meiosis I

c)

Meiosis 2

d)

Cytokinesis

35.

What part of cell division is this?

a)

Interphase

b)

Meiosis I

c)

Meiosis 2

d)

Cytokinesis

36.

What is the genotype of a homozygous recessive parent?

a)

GG

b)

Gr

c)

gg

d)

Gg