Free Printable General Science: Genetics and Punnett Squares

Worksheets

General Science: Genetics and Punnett Squares

Total questions: 20

Worksheet time: 34mins

Name

Class

Date

In a punnet square where are the parent alleles written?

Top and inside the boxes

Only on the left and right side of the boxes.

outside of the boxes (top and left side)

All on the top side of the boxes

What is probabilty?

is the mathematical chance of a specific outcome in relation to the total number of possible outcomes.

is the mathematical formula to additional and subtraction of genotypes

is the mathematical chance of a specific relationship between genotype and phenotype

All of the above

Each one of the boxes on the Punnett Square represents what probability of an offsprings' genotype?

25%

10%

What you see, or the physical appearance.

Genotype

Phenotype

Homozygous

Heterozygous

Aa, DD, Bb, yy are all examples of

genotypes

phenotypes

AA and Aa always show up as the _______________ trait.

dominant

recessive

aa always shows up as

dominant

recessive

What ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness?

0 in 4

1 in 4

2 in 4

4 in 4

A green pea plant (GG) is being crossed with a green pea plant (Gg). What are the possible phenotypes (%) of the offspring??

100 % rainbow

50% yellow and 50% green

100% green

100% yellow

10.

A tall plant (TT) is crossed with a tall plant (Tt). What are the possible genotypes of the offspring?

2 TT: 2 Tt: 0 tt

1 TT: 2 Tt: 1 tt

2 TT: 1 Tt: 1 tt

0 TT: 0 Tt: 4 tt

11.

Which of the following genotypes is homozygous dominant?

12.

Which of the following genotypes is heterozygous?

13.

In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is/are the possible genotype/s that would result in a red-flowering plant?

RR or Rr

14.

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

recessive

dominant

lower case letter

both

15.

T - tall and t = short

In the punnett square below, what belongs in the missing square

16.

A homozygous dominant brown mouse is crossed with a heterozygous brown mouse (tan is the recessive color). What are the possible phenotypes (%) of the offspring?

100 % tan

100 % brown

50 % brown and 50% tan

75 % brown and 25 % tan

17.

A red flower (Rr) is crossed with a white flower (rr). What are the possible genotypes of the offspring?

0 RR; 0 Rr: 4 rr

2 RR; 0 Rr: 2 rr

4 RR; 0 Rr: 0 rr

0 RR; 2 Rr: 2 rr

18.

Which choice best represents the possible genotypes of the offspring in this cross?

1 Yy: 2 yy: 0 YY

2 Yy: 2 yy: 0 YY

3 Yy: 1 yy: 0 YY

1 Yy: 3 yy: 0 YY

19.

What are the possible phenotype PERCENTAGES of the offspring? (A-Brown hair; a-blond hair)

50 % Brown Hair and 50% Blond Hair

25 % Brown Hair and 75% Blond Hair

75 % Brown Hair and 25% Blond Hair

0% Brown Hair and 100% Blond Hair

20.

If you have a male with large wings (DD) and a female with small wings (dd). What ALLELE stands for large wings?

Reset

General Science: Genetics and Punnett Squares

Total questions: 20

Worksheet time: 34mins

Similar Resources on Wayground