Free Printable Genetics/DNA

Worksheets

Genetics/DNA

Total questions: 21

Worksheet time: 3hrs 20mins

Name

Class

Date

What is the probability of heterozygous offspring?

25%

50%

100%

What allele combination should go in the missing box?

none of these

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

25%

10%

Which of the following is homozygous recessive?

A ____ is a region of DNA that controls a trait.

gene

phenotype

chromatin

genotype

Which genotypes are homozygous?

Both EE and tt

The ____ is the physical appearance of an organism.

genotype

phenotype

What does DNA stand for?

Deoxyribonucleic acid

Denitrogenous acid

Deribonucleic acid

Diribonucleic acid

Guanine bonds with ______________.

Adenine

Guanine

Cytosine

Thymine

10.

Which shows the correct complementary base pairing for DNA?

C-A, T-G

A-G, C-T

C-G, U-A

T-A, G-C

11.

A homozygous dominant woman marries a man with freckles. What are the chances of a freckled baby?

25%

50%

75%

100%

12.

A heterozygous woman marries a heterozygous man. What is the chance of having a brown eye baby?

25%

50%

75%

100%

13.

A blonde woman marries a heterozygous man. What are the chances of a blonde hair baby?

25%

50%

75%

100%

14.

Which of the following is an example of phenotype?

blue eyes

15.

Which of the following genotypes are purebred?

16.

An organism's physical appearance or visible traits. (what it looks like)

phenotype

genotype

17.

A chart that shows all the possible combinations of alleles that can result from a genetic cross

dominant allele

codominance

probability

Punnett Square

18.

An organism that has two identical (THE SAME) alleles for a trait (purebred)

homozygous

heterozygous

19.

In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?

Tall = T
Short = S

Tall = T
Short = t

Tall = t
Short = T

Tall = TT
Short = tt

20.

Georgette wants to breed her pet phoenixes, but she isn't sure if the babies will burst into blue flames or red flames. Her documents show that her female phoenix is homozygous dominant for red flames, while her male phoenix is homozygous recessive for blue flames. What color flames will the babies have?

Red

Blue

Purple

50% Red, 50% Blue

21.

Bob the abominable snowman lives in the snowy Andes mountains. He has white fur, which blends in nicely. He is therefore dismayed when his mate keeps having red-furred babies. What is Bob's likely genotype?

Homozygous Dominant

Heterozygous

Homozygous Recessive

Reset

Genetics/DNA

Total questions: 21

Worksheet time: 3hrs 20mins

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