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WorksheetsGenetics and Punnett Square Review
Total questions: 15
Worksheet time: 15mins
Study the Punnett Square. What is the probability of a dominant trait showing up?
0%
25%
50%
100%
Study the Punnett Square. What is the probability of having heterozygous dominant traits?
0%
25%
50%
75%
Who was Gregor Mendel?
A famous physicist.
The astronomer who discovered Pluto.
A priest considered the Father of Genetics.
A biologist who discovered viruses.
On Mars, it is preferable to have dominant green skin (G) versus red skin (g). A male with heterozygous alleles will have a little Martian with a female that has red skin. Draw a Punnet Square to show their probability for having a green-skinned Martian and then choose the correct answer.
They will have a 100% to have a green-skinned Martian because the dominant allele will mask the red allele.
There is 0% chance to have a green-skinned Martian because you need two recessive genes to get the dominant trait.
There is a 50% chance to have a green-skinned Martian.
In alleles, capital letters show:
Recessive traits.
Dominant traits.
Homozygous means:
Different alleles. Ex: Tt
Same alleles. Ex: tt
Heterozygous means:
Same alleles. Ex: TT
Different alleles. Ex: Tt
What is true about genotypes?
Genotypes are the traits that show up.
Genotypes are the gene combinations.
What did Mendel use for his experiments?
Planets.
Lemon trees.
Pea plants.
Humans.
What was Mendel's big discovery?
Traits are Not passed on to offspring.
Traits can be masked in one generation and show up in a future generation.
Pea plants have flowers.
Pea plants produce peas.
Hair color is an example of incomplete dominance.
True
False
What is a good explanation of Codominance?
Traits work together to help an organism live..
Traits are mixed and blended.
Two dominant genes show traits.
No traits are shown.
What is the purpose of a Punnett Square in genetics?
To predict the likelihood of certain traits in offspring
To determine the age of fossils
To measure the speed of chemical reactions
To identify the structure of DNA
In a genetic cross between two heterozygous individuals (Aa x Aa), what is the probability of producing a homozygous recessive offspring?
0%
25%
50%
75%
Which of the following best describes a phenotype?
The genetic makeup of an organism
The physical expression of a trait
The location of a gene on a chromosome
The process of cell division
