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Worksheets

Heredity

Total questions: 9

Worksheet time: 3mins

Name
Class
Date
1.

A version or variation of a gene

a)

trait

b)

gene

c)

allele

d)

DNA

2.

When an organism has two of the same alleles, it is called

a)

homozygous

b)

heterozygous

c)

recessive

d)

dominant

3.

This type of allele is expressed whether there are one or two copies present.

a)

dominant

b)

recessive

c)

homozygous

d)

heterozygous

4.

These types of alleles are only expressed if the organism has two copies

a)

dominant

b)

recessive

c)

homozygous

d)

heterozygous

5.

A segment of DNA that has the ability to code for a specific trait.

a)

gene

b)

allele

c)

chromosome

d)

chromatid

6.
B=Blonde Hair b=Brown Hair
If a person was Bb they would have
a)
Blonde Hair
b)
Brown Hair
7.

Recessive alleles are found less frequently among organisms

a)

True

b)

False

8.

What is the phenotypic ratio when you cross Tt with tt?

T = tall, t = short


The following ratios are for Tall : Short

a)

3:1

b)

1:1

c)

All tall

d)

All short

9.

A skin cell is different from an eye cell because they contain different genes

a)

True

b)

False