Free Printable Important Genetics Vocabulary

1.

The passing of genes from parents to offspring?

a)

Punnett Square

b)

Heredity

c)

Probability

d)

Genetics

2.

A chart used to show all the ways genes from two parents can combine and be passed to offspring is a

a)

Pie chart

b)

Punnett Square

c)

Line Graph

d)

Bar Graph

3.

an organism that inherits two of the same alleles from its parents

a)

homozygous

b)

phenotype

c)

heterozygous

d)

dominant

4.

What is the expression of a gene called?

a)

The genotype

b)

The phenotype

c)

Monohybrid cross

d)

Dihybrid cross

e)

Heterozygous genes

5.

What would be the expected ratio of genotypes in a cross between two parents who were both heterozygous?

a)

100% homozygous dominant

b)

50% homozygous dominant, 50% homozygous recessive

c)

25% homozygous dominant, 50% heterozygous, 25% homozygous recessive

d)

100% homozygous recessive

e)

100% heterozygous

6.

If one parent has two genes for brown eyes (BB) and the other has two genes for blue eyes (bb), what is the chance that their offspring will have blue eyes?

a)

50%

b)

25%

c)

0%

d)

100%

7.

A gardener is interested in growing pea plants of a particular height. He draws a Punnett square to display all the possible combinations of alleles when two hybrid pea plants are crossed to help him determine the possible genotypes of the offspring. T represents the dominant allele for tall plants, and t represents the recessive allele for short plants. The genotype of one parent plant is shown on the top of the square, and the other parent’s genotype is shown on the left of the square. The genotypes of the offspring are shown in the boxes. The Punnett square is shown here:

What is the probability that an offspring will be tall?

a)

0%

b)

25%

c)

75%

d)

100%

8.

What does it mean for a gene to be sex-linked?

a)

It is found in only one gender: either male or female

b)

It is located on autosomes

c)

It is a gene located on the X or Y chromosome

d)

It is a gene that only affects the reproductive structures of an organism

9.

A gardener is interested in growing pea plants of a particular height. He draws a Punnett square to display all the possible combinations of alleles when two hybrid pea plants are crossed to help him determine the possible genotypes of the offspring. T represents the dominant allele for tall plants, and t represents the recessive allele for short plants. The genotype of one parent plant is shown on the top of the square, and the other parent’s genotype is shown on the left of the square. The genotypes of the offspring are shown in the boxes. The Punnett square is shown here:

Fill in the blanks to correctly complete the sentence:

The genotype of both parent plants is __________, which means that both parents will be __________.

a)

Heterogeneous and tall.

b)

Heterogeneous and short.

c)

Homozygous and Tall

d)

Homozygous and Short

10.

The particular mix of alleles (letter combinations) is an organism's

a)

phenotype

b)

chromosomes

c)

genome

d)

genotype

11.

The basic unit of heredity that consists of a segment of DNA on a chromosome

a)

gene

b)

double helix

c)

homozygous

d)

chromosome

12.

An organism's physical appearance is its

a)

Genotype

b)

Chromosomes

c)

Alleles

d)

Phenotype

13.

Another term for the study of heredity is

a)

botany

b)

biology

c)

genetics

d)

inheritance

14.

An organism that inherits two different alleles from its parents is said to be

a)

dominant

b)

homozygous

c)

recessive

d)

heterozygous

15.

Genotype is

a)

the number of chromosomes

b)

the physical appearance of an organism

c)

the number of genes in an organism

d)

the particular alleles or letter combinations

16.

An alternate form of a gene for a specific trait or gene product is called

a)

genotype

b)

allele

c)

chromosome

d)

phenotype

17.

Select the answer that shows a GENOTYPE

a)

Gg, Green

b)

Tall and Blue

c)

SS, Ff

d)

Rr and Red

18.

What is the term that describes an allele that is NOT expressed when combined with a dominant form of the allele?

a)

Gene

b)

Phenotype

c)

Homozygous

d)

Recessive

19.

What is the term that describes the allele that determines the phenotype of an individual when two different copies are present in the genotype?

a)

Dominant

b)

Recessive

c)

Heterozygous

d)

Homozygous Dominant

20.

A gene with a mix of alleles (Bb) is considered to be a ____ gene.

a)

Purebred

b)

Hybrid

c)

Homozygous recessive

d)

Dominant

21.

Mendel

a)

Took x-rays of DNA

b)

Discovered the shape of DNA

c)

Grew peas and discovered that alleles could be dominant or recessive.

d)

Invented Genetics

22.

The likelihood or chance that a specific outcome will occur out of a total number of outcomes is called

a)

Percentage

b)

Ratio

c)

Probability

d)

Possibility

23.

Which answer shows a phenotype of an organism?

a)

Gg, Green pea pods

b)

Tall and yellow pea pods

c)

TT, Gg

d)

tt, short

24.

When in the presence of a dominant gene, the recessive gene is

a)

expressed

b)

blended

c)

hidden

d)

both genes are expressed

Important Genetics Vocabulary

Total questions: 24

Worksheet time: 12mins

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