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Genetics review

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

How many laws did Mendel discover

a)

1

b)

2

c)

3

d)

5

2.

If a man is heterozygous for hitchhikers thumb and another woman is also heterozygous for hitchhikers thumb, what would the genotype ratio be if there is a cross with them?

a)
1:2:1
b)
1:3:1
c)
1:1:1
d)
2:1:1
3.

If a man is heterozygous for hitchhikers thumb and another woman is also heterozygous for hitchhikers thumb, what would the phenotype ratio be if there is a cross with them?

a)

3:1

b)

2:2

c)

1:3

d)

4:0

4.

Mendel's three laws are the law of segregation, the law of dominance, and the law of ___________ _________ (there is a space in the answer)

(a)  

5.

What order do you write the genotype ratio?

a)

Heterozygous Homozygous dominant Homozygous recessive

b)

Homozygous recessive Heterozygous

Homozygous dominant

c)

Heterozygous Homozygous recessive Homozygous dominant

d)

Homozygous dominant

Heterozygous Homozygous recessive

6.

What order do you write the phenotype ratio?

a)

Dominant trait Recessive trait

b)

Trait A Trait B

c)

Recessive trait Dominant trait

d)

Phenotype

Genotype

7.

Which of the following is homozygous dominant?

a)

RR

b)

Rr

c)

rr

d)

rR

8.

Which of the following is heterozygous?

a)

MM

b)

Mm

c)

mm

d)

mM

9.

Which of the following is homozygous recessive?

a)

QQ

b)

Qq

c)

qq

d)

qQ

10.

Which of the these is homozygous?

a)

gg

b)

Yy

c)

Nn

d)

Ee

11.

A ______ ______is used to predict the possible genotype from certain parents

(there is a space in the answer)

(a)  

12.

How are recessive traits written?

a)
Capital
b)
Lowercase
c)

Numbers

d)

Symbols

13.
The different forms of genes are known as
a)

Environment

b)

Probability

c)

Traits

d)

Alleles

14.

The mathematical chance that something will happen is known as

a)

Chance

b)

Luck

c)

Probability

d)

Bird food

15.
Heredity is the passing of traits from _____________________ to _____________________
a)

Predators to prey

b)

Water to rain

c)

Parents to offspring

d)

Offspring to parents

16.

What is a phenotype?

a)

The alleles in an organism

b)

The genetic code

c)

A fake gene

d)

The physical traits expressed

17.
What is a genotype? 
a)

The genetic make up

b)

The physical traits

c)

A chance of genes combining

d)

A chance of genes fading

18.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)

Recessive

b)

Dominant

c)

Lower case letter

d)

Both

19.

Who is known as the father of genetics?

a)
Albert Einstein
b)
Gregor Mendel
c)

Benjamin Franklin

d)
Isaac Newton
20.

What is the study of how traits are passed from parents to offspring?

a)

Biology

b)

Botany

c)

Molecular biology

d)

Genetics