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SB3a Law of Dominance Quiz

Total questions: 15

Worksheet time: 8mins

Name
Class
Date
1.

2 identical alleles for the same trait. John has 2 genes for brown eyes so he is __

a)

dominant

b)

homozygous

c)

heterozygous

d)

allele

e)

recessive

2.

Different alleles for the same trait. Sue has one gene for brown eyes and one gene for blue eyes.

a)

dominant

b)

homozygous

c)

heterozygous

d)

allele

e)

recessive

3.

A specific characteristic. Mendel looked at 7 different ___ in peas such as color and pod shape.

a)

dominant

b)

trait

c)

allele

d)

recessive

4.

One of a number of different forms of a gene. The two ____ for pea color were yellow and green.

a)

dominant

b)

traits

c)

alleles

d)

recessive

5.

The allele that is expressed most often.

a)

dominant

b)

trait

c)

allele

d)

recessive

6.

The allele that is hidden unless both genes are present.

a)

dominant

b)

trait

c)

allele

d)

recessive

7.

John has 2 genes for blue eyes. His genotype is

a)

homozygous

b)

heterozygous

8.

Sally's genotype is heterozygous. Her genotype is written as..

a)

D D

b)

d d

c)

D d

9.

A sequence of DNA that codes for a particular protein and thus determines a trait. There are hundreds of ______ on each chromosome.

a)

Mendel

b)

genes

c)

Darwin

d)

phenotype

e)

genotype

10.

The physical characteristics of an organism that is expressed. John has blue eyes and brown hair.

a)

Mendel

b)

genes

c)

Darwin

d)

phenotype

e)

genotype

11.

Austrian Monk called the Father of Genetics for determining how traits are passed down in pea plants

a)

Mendel

b)

genes

c)

Darwin

d)

phenotype

e)

genotype

12.

The genetic makeup of an organism. John has 2 genes that are homozygous recessive for eye color {e e }

a)

Mendel

b)

genes

c)

Darwin

d)

phenotype

e)

genotype

13.

The likelihood that a particular event will occur. Both Randal and I have blue eyes so the _________ that Baby Ethan will have blue eyes was 100%.

a)

homozygous

b)

heterozygous

c)

probability

d)

phenotype

e)

genotype

14.

Brown eyes are dominant over blue eyes

B - brown eyes b - blue eyes

Baby Ethan is homozygous recessive for blue eyes


Baby Ethan's phenotype is....

a)

brown eyes

b)

blue eyes

c)

B B

d)

B b

e)

b b

15.

Brown eyes are dominant over blue eyes

B - brown eyes b - blue eyes

Baby Ethan is homozygous recessive for blue eyes


Baby Ethan's genotype is....

a)

brown eyes

b)

blue eyes

c)

B B

d)

B b

e)

b b