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Genetics: Genotypes and Phenotypes -- Part A

Total questions: 31

Worksheet time: 16mins

Name
Class
Date
1.

Gene trait that is represented by single letters. Example: B, b

a)

Genotype

b)

Allele

c)

Phenotype

2.

A combination of alleles. Example: BB, Bb, bb,

a)

Genotype

b)

Allele

c)

Phenotype

3.

Observable trait description. Words that describe a trait.

a)

Genotype

b)

Allele

c)

Phenotype

4.

Both alleles for a gene are identical (the same).

a)

Homozygous

b)

Heterozygous

5.

The alleles for a gene are different. (Called hybrids).

a)

Homozygous

b)

Heterozygous

6.

Both Homozygous Dominant (BB) and Homozygous Recessive (bb) are also called purebreds

a)

True

b)

False

7.

The genotype Bb is _____________________.

a)

Homozygous

b)

Heterozygous

8.

The genotype bb is __________________ .

a)

recessive

b)

dominant

9.

For a cross to be _________________ at least one capital letter must be present in genotype.

a)

recessive

b)

dominate

10.

Which genotype is homozygous dominant?

a)

BB

b)

Bb

c)

bb

11.

Which genotype is homozygous recessive?

a)

BB

b)

Bb

c)

bb

12.

Which genotype is heterozygous?

a)

BB

b)

Bb

c)

bb

13.

Each parent provides what percentage of your traits?

a)

25%

b)

50%

c)

75%

d)

100%

14.

Which of the following is an example of a homozygous genotype?

a)

Rr

b)

rr

c)

NN

d)

Nr

15.

Which of the following is an example of an allele?

a)

H

b)

HH

c)

Hr

d)

RRR

16.

If your genotype is Bb, what type of trait would you express as a phenotype?

a)

Dominant

b)

Recessive

c)

Both the dominant and recessive traits

17.
The physical appearance of an organism based on traits
a)
Genotype
b)
Phenotype
c)
Meiosis
d)
Genetics
18.
What does the prefix homo- in homozygous mean?
a)
same
b)
different
c)
dating
d)
humans
19.
rr
a)
Homozygous Dominant
b)
Homozygous Recessive
c)
Heterozygous
d)
Heterozygous Recessive
20.

A recessive allele is written as a(n)

a)

lower case letter

b)

upper case letter

c)

hashtag

d)

smiley face

21.

In the Greek language, "hetero" means

a)

same

b)

different

c)

burrito

22.

In the Greek language, "homo" means

a)

same

b)

different

c)

human

d)

mojo

23.

An example of a heterozygous gene is

a)

FF

b)

ff

c)

Ff

24.

An example of a homozygous recessive gene is

a)

Dd

b)

DD

c)

dd

d)

DAB

25.

What is genetics?

a)

The study of how traits are passed down

b)

The study of the Earth

c)

The study of force and motion

d)

The study of energy

26.

Gregor Mendel discovered properties of heredity by experimenting on _____________.

a)

Chromosomes

b)

Human eye color

c)

Pea Plants

d)

Flowers

27.

How are alleles represented in genetics?

a)

Numbers

b)

Letters

c)

Emojis

d)

Scientific Names

28.

Which type of gene can prevent another gene from "showing"?

a)

Dominant

b)

Recessive

29.

In genetics, dominant alleles are usually represented by

a)

capital letters

b)

lower case letters

c)

math symbols

d)

fractions

30.

When an organism has two different alleles, it's called

a)

purebred

b)

dominant

c)

heterozygous

d)

recessive

31.

If a pea plant were homozygous recessive for height, how would its alleles be represented?

a)

Tt

b)

TT

c)

tt

d)

tT