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Genetics Review

Total questions: 27

Worksheet time: 14mins

Name
Class
Date
1.

Who is considered the father of genetics?

a)

Charles Darwin

b)

Gregor Mendel

c)

Watson & Crick

d)

Rosalind Franklin

2.

An organism's phenotype describes its

a)

genetic makeup.

b)

physical appearance.

c)

alleles.

d)

pattern of inheritance.

3.
What do you call a section of DNA that codes for a specific trait?
a)
nucleus
b)
chromosome
c)
gene
d)
DNA
4.
Purebred is another word for __________, while hybrid is another word for __________.
a)
dominant; recessive
b)
recessive; dominant
c)
homozygous; heterozygous
d)
heterozygous; homozygous
5.

Which of the following options contains only genotypes for homozygous recessive?

a)

aa, gg, pp

b)

Aa, Gg, Pp

c)

AA, gg, PP

d)

AA, GG, PP

6.

Which law states that an organism's phenotype will be the dominant one if both a dominant and recessive allele are present in the genotype?

a)

law of segregation

b)

law of independent assortment

c)

law of dominance

d)

law of heterozygotes

7.

For which pattern of dominance do we typically use two different uppercase letters?

a)

complete

b)

incomplete

c)

codominance

d)

polygenic

8.

Mendel ___________________ the P generation and ___________________ the F1 generation.

a)

cross-pollinated; self-pollinated

b)

self-pollinated; cross-pollinates

c)

cross-pollinated; cross-pollinated

d)

self-pollinated; self-pollinated

9.

When Mendel crossed a purebred purple flower and purebred white flower in his P generation, the F1 generation was

a)

all purple.

b)

all white.

c)

some purple and some white.

d)

mostly purple and a few white.

10.

Punnett squares represent which law?

a)

dominance

b)

segreation

c)

independent assortment

d)

fertilization

11.

What was the third generation in Mendel's experiments called?

a)

P

b)

F1

c)

F2

d)

F3

12.

What is the phenotypic ratio for a dihybrid cross, such as AaBb x AaBb?

a)

1:1:1:1

b)

9:3:3:1

c)

3:1

d)

8:3:3:2

13.

Dihybrid crosses represent which law?

a)

dominance

b)

segregation

c)

independent assortment

d)

recessiveness

14.

Flowers can be red or white. Which pattern of inheritance is this?

a)

incomplete

b)

complete

c)

codominance

d)

multiple alleles

15.

Which pattern did we talk about that has 4 different possible phenotypes?

a)

incomplete

b)

codominance

c)

polygenic

d)

multiple alleles

16.

What is an example of a polygenic trait?

a)

snapdragon flower color

b)

cattle color

c)

blood type

d)

eye color

17.

Which type of inheritance involves more than one dominant allele?

a)

incomplete

b)

codominance

c)

sex-linked

d)

complete

18.

A child has type AB blood. Which of these blood types could either of her parents definitely NOT be?

a)

type A

b)

type B

c)

type AB

d)

type O

19.

What would be the sex chromosomes for a male?

a)

XX

b)

XY

c)

YY

d)

XXY

20.

Which of the following traits is a sex-linked trait?

a)

height

b)

colorblindness

c)

blood type

d)

pea plant seed color

21.

Someone has type A blood. What would be their genotype?

a)

ii

b)

IAIB

c)

IAIA or IAi

d)

IAIB or IAIA

22.

A new breed of pea plants has been discovered! Their seeds can be blue, green, or yellow. What type of inheritance do these new pea plants follow?

a)

complete

b)

incomplete

c)

codominance

d)

multiple alleles

23.

Elephants can be dark gray, light gray, or light gray with dark gray patches. What pattern of inheritance does elephant color follow?

a)

codominance

b)

sex-linked

c)

complete

d)

incomplete

24.

A trait that is much more common in males than females would most likely be a

a)

sex-linked trait.

b)

completely dominant trait.

c)

codominant trait.

d)

incompletely dominant trait.

25.

Almost any of an organism's phenotypes are determined by not only their genotype but also

a)

their number of cells.

b)

their height.

c)

the environment.

d)

their blood type.

26.

What would be the genotype of a female who is a carrier for colorblindness?

a)

XBXB

b)

XbXb

c)

XBXb

d)

XbY

27.

Widow's peak is dominant to straight hairline. What would be the possible genotype(s) of someone who has a Widow's peak?

a)

ww only

b)

WW only

c)

WW or Ww

d)

WW or ww