Free Printable Introduction to genetics

Worksheets

Introduction to genetics

Total questions: 20

Worksheet time: 12mins

Name

Class

Date

which is heterozygous ?

Which is homozygous ?

the genetic makeup of an organism

heterozygous

punnet square

genotype

Genotype refers to the ...

physical expression of the genes

the possible combination of alleles in a gene

whether an allele is dominant or recessive

how an organism will appear

An offspring will receive how many alleles from each parent to determine a specific trait?

one

two

three

five

What is a phenotype

The genetic make up (code)

The physical trait

G = green, g = yellow

This gene shows complete dominance. The genotype for a yellow plant is...

all of the choices result in yellow

An allele whose trait only shows up when no dominant allele is present.

hidden allele

dominant allele

recessive allele

present allele

B=brown eyes
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.

they have same phenotype and genotype

they have different genotypes and phenotypes

they have same phenotype but different genotypes

they have same genotype but different phenotypes

10.

What does heterozygous mean?

An organism that has the same genes for a trait (TT or tt)

An organism that has different genes for a trait (Tt)

When neither gene is fully dominant; offspring is a mixture of both

the different forms of a trait (hair color--> brown, blonde, red

11.

A heterozygous yellow pea plant's genotype would be:

12.

Who is called the "Father of Genetics"?

Walter Sutton

Albert Einstein

Gregor Mendel

Charles Darwin

13.

The different forms of genes are known as

environment

probability

traits

alleles

14.

G = dominant green and g = recessive yellow

A fish has a Gg genotype, what will its phenotype be?

yellow

green

greenish-yellow

red

15.

Dominant alleles are represented by a:

Male gene

lowercase letter

recessive trait

capital letter

16.

Why are your chromosomes arranged in pairs?

Scientists have no idea

Because you get one from your mom and one from your dad

Because pairs can divide easier

Because DNA is awesome

17.

What kind of cells are made in MEIOSIS?

Haploid Gametes

Diploid Somatic Cells

Skin Cells

Liver Cells

18.

If red flowers (R) are dominant over white, what is the probability that the offspring will be red?

1 out of 4

2 out of 4

3 out of 4

4 out of 4

19.

When two or more alleles for a trait exist in a population. Ex: Different hair colors

Polyploidy

Multiple Genes

Multiple Alleles

Polysaccharide

20.

Mark is heterozygous. If B is for brown hair, and b is for blonde hair, what is Mark's phenotype?

Brown Hair

Blonde Hair

Brown and Blonde Hair

Black Hair

Reset

Introduction to genetics

Total questions: 20

Worksheet time: 12mins

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