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Mendel genetics

Total questions: 24

Worksheet time: 33mins

Name

Class

Date

Which of the following is heterozygous?

Which of the following is homozygous dominant?

Which of the following is homozygous recessive?

What term denotes the physical expression of a gene?

genotype

phenotype

appearance

homologous

Which of the following would produce a recessive phenotype?

T - tall and t = short
In the punnett square below, what belongs in the missing square

If long hair is dominant, and my cat has long hair then his genotype must be

HH or Hh because they show the same phenotype

___________________________ is the field of science that studies of how traits are passed on, or inherited.

dominant traits

ratio

phenotype

genetics

Which is a true statements about this picture?

Brown is recessive

Brown is dominant

Blue is dominant

Blue is codominant

10.

What is a gene?

An entire chromosome that codes for a trait

a piece of clothing

a piece of a DNA on chromosome that codes for a trait

Chemical messengers in your brain that code for a trait

11.

If brown hair is represented by the allele "B" and blond hair is represented by the allele "b" then what must be the genotype of someone who has blond hair?

either BB or Bb

12.

True or False: An allele is a variation of a certain gene. Example: Different Eye Colors

True

False

13.

What is the probability of heterozygous offspring?

25%

50%

100%

14.

What is the phenotype 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

15.

Individuals that do not exhibit a trait, but have children that do have the trait must be

a carrier of that allele, or heterozygous

have a mutation that is dominant

be homozygous dominant so the trait is not seen

16.

T2 - Recessive alleles may not be expressed because they are

masked by the dominant allele

the least common allele in the population

the most common allele in the population

less likely to having crossing over

17.

T2 - An allele whose trait always shows up in the organism when the allele is present.

recessive allele

dominant allele

hidden allele

present allele

18.

T2 - Which observation of dihybrid crosses led to Mendel's law of independent assortment

Particular individual traits persisted for many generations

Many combinations of traits were always inherited together

Some combinations of traits were not passed onto offspring

The presence of one trait didn't affect the presence of another

19.

T3 - having two of the same alleles for the trait (sometimes called purebred).

homozygous

hetrozygous

protein

chromosome

20.

T3 - What does heterozygous mean?

An organism that has the same alleles for a trait (TT or tt)

An organism that has different alleles for a trait (Tt)

When neither allele is fully dominant; offspring is a mixture of both

the different forms of a trait (hair color--> brown, blonde, red

21.

T3 - Which of the following is a genotype?

long hair

blue eyes

tall

22.

T3 - Having two different alleles for a trait (sometimes called hybrid).

protein

homozygous

heterozygous

genotype

23.

What goes in box 13

ABab

abab

ABAB

AbAb

24.

If R is dominant for round and Y is dominant for yellow. Based off this Punnett Square, how many seeds will be round, yellow seeds?

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Mendel genetics

Total questions: 24

Worksheet time: 33mins

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