Wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Breeding and Genetics

Total questions: 17

Worksheet time: 21mins

Name
Class
Date
1.

How many Nitrogen Bases are there?

a)

2

b)

4

c)

3

d)

5

2.

DNA are read in pairs pf three called a

(a)  

3.

What law are alleles on pairs of chromosomes allocated gametes randomly?

(a)  

4.

What Nitrogenous Bases are paired together?

a)

AT

b)

GT

c)

AG

d)

GC

5.

What is a dominant gene?

4 lines
6.

Codons tell cells to make

(a)  

7.

What is a recessive gene?

4 lines
8.

An allele is a variation of a

(a)  

9.

What do you find on the locus?

a)

chromosome

b)

gene

c)

DNA

d)

nitrogenous bases

10.

What does the phenotype show?

a)

if the animal is male or female

b)

the DNA the animal has

c)

the physical attributions the animal has

11.

What is expressed in the phenotype?

4 lines
12.

Heterozygous means the alleles are

(a)  

13.

A genotype is the

(a)  

14.

Homozygous alleles are

a)

different

b)

the same

15.

What is the law of segregation?

a)

during the formation of gametes chromosome pairs are separated

b)

some alleles are dominant to others

c)

different genes are inherited separately

16.

Homozygous can be both

(a)  

17.

In the law of ____ the ____ allele is expressed

(a)