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Worksheets

Genetics

Total questions: 11

Worksheet time: 26mins

Name
Class
Date
1.

This refers to the actual physical characteristics shown by a person

a)

Genotype

b)

Phenotype

c)

Karyotype

d)

Allelotype

2.

This scientist was considered the Father of Modern Genetics

a)

Gregorio Johan Mendel

b)

Gregor Johan Mendel

c)

Gregorio Johann Mendel

d)

Gregor Johann Mendel

3.

This states that gametes carry hereditary information, thus he stated that alleles of one trait separate from each other during gamete formation

a)

Law of Dominance

b)

Law of Segregation

c)

Law of Independent Assortment

d)

Law of Dependent Disassortment

4.

This is a sugar that is attached to the double - stranded molecule.

a)

Ribose

b)

Fructose

c)

Cellulose

d)

Deoxyribose

5.

This states that one factor may mask the expression of the other.

a)

Law of Dominance

b)

Law of Segregation

c)

Law of Independent Assortment

d)

Law of Dependent Disassortment

6.

A phenotypic ratio of 3:1 in the offspring of a mating of two organisms heterozygous for a single trait is expected when:

a)

The alleles segregate during mitosis

b)

The alleles segregate during meiosis

c)

Each allele contains two mutations

d)

The alleles are identical in nature

e)

Only recessive alleles are expressed

7.

In Mendel's "Experiment 1," true-breeding pea plants with spherical seeds were crossed with true-breeding plants with dented seeds. (Spherical seeds are the dominant characteristic.) Mendel collected the seeds from this cross, grew F1-generation plants, let them self-pollinate to form a second generation, and analyzed the seeds of the resulting F2 generation. The results that he obtained, and that you would predict for this experiment are:

a)

All F1 and 3/4 of F2 seeds are spherical

b)

1/2 of F1 and 3/4 of F2 seeds are spherical

c)

1/2 of F1 and 1/4 of F2 seeds are dented.

d)

3/4 of F1 and 9/16 of F2 seeds are spherical

e)

All F1 and F2 seeds are spherical containing hybrid genes

8.

In pea plants, spherical seeds (S) are dominant to dented seeds (s). In a genetic cross of two plants that are heterozygous for the seed shape trait, what percentage of the offspring should have spherical seeds?

a)

0%

b)

25%

c)

50%

d)

75%

e)

100%

9.

A genetic cross between two F1-hybrid snapdragon flowers for red color will yield what percent red-colored flowers in the F2 generation? (pink is the recessive gene)

a)

0%

b)

25%

c)

50%

d)

75%

e)

100%

10.

Which of the following genetic crosses would be predicted to give a phenotypic ratio of 9:3:3:1?

a)

SSYY and ssyy

b)

SSYy and ssYY

c)

SsYy and SsYy

d)

SSyy and ssYY

11.

n rabbits, white fur (W) is dominant to black (w), and long ears (E) are dominant to short ears (e).

A breeder mates two rabbits that are heterozygous (WwEe) for both traits.

What is the chance that the offspring will be black with long ears?

a)

1/2

b)

3/4

c)

1/4

d)

1/8

e)

3/16