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Mendel Genetics

Total questions: 42

Worksheet time: 1hrs 11mins

Name

Class

Date

The physical appearance or the way a gene looks is known as it's....

genotype

allele

gene

phenotype

An allele or gene that always shows is

recessive

dominant

hidden

present

Two of the same genes for a trait (sometimes called purebred). BB or bb

homozygous

hetrozygous

protein

chromosome

Two different genes for a trait (sometimes called hybrid). Bb

protein

homozygous

heterozygous

genotype

What would the ratio for genotypes be for this Punnett Square?

2Bb:2bb

2BB:2Bb

1BB:2Bb:1bb

4Bb

Which is a true statements about this picture?

Brown is recessive

Brown is dominant

Blue is dominant

Blue is codominant

Tomato plants usually have hairy stems. Hairless stems are present in tomato plants that are homozygous recessive for this trait. If the stem characteristics are determined by a single gene, what are the expected phenotype percentages for the offspring of a heterozygous hairy plant and a hairless plant?

100% hairy, 0% hairless

75% hairy, 25% hairless

50% hairy, 50% hairless

25% hairy, 75% hairless

How many alleles (letters) do each person carry for a trait?

What are the possible genotypes for this cross?

TT = 25% Tt= 50% tt=25%

all tall

TT= 75% tt = 25%

Tt = 100%

10.

This pedigree represents the inheritance of hemophilia in this family. How many of the females have the hemophilia trait?

11.

Is this trait (the shaded individuals) dominant or recessive?

dominant

recessive

12.

How many females are in this pedigree?

13.

A red flowered plant (RR) is crossed with a white flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers?

25%

50%

100%

14.

What type of inheritance do two alleles have if their traits blend together?

Incomplete Dominance

Co-Dominance

15.

This is an example of ___________?

Incomplete dominance

Co-Dominance

16.

This is an example of ___________.

Incomplete Dominance

Codominance

17.

This type of inheritance pattern is a MIXTURE of both traits.

incomplete dominance

co-dominance

complete dominance

18.

In chickens, feather color is codominant. If a black chicken BB is mated with one that is black and white (BW) what are the chances of having a chicken that is black and white?

50%

25%

100%

19.

Which of the following is a hybrid?

20.

In Andalusian fowls, black individuals (BB) and white individuals (bb) are homozygous. Heterozygous individuals are grey (Bb).
Cross a black fowl with a white fowl. What is the phenotype ratio?

4 black: 0 grey: 0 white

2 black: 2 grey: 0 white

0 black: 4 grey: 0 white

0 black: 2 grey: 2 white

21.

In Andalusian fowls, black individuals (BB) and white individuals (bb) are homozygous. Heterozygous individuals are grey (Bb).
What is the genotype ratio for a cross between a grey fowl and a white fowl?

2 BB: 2 Bb: 0 bb

0 BB: 4 Bb: 0 bb

0 BB: 2 Bb: 2 b

1 BB: 2 Bb: 1 bb

22.

In some carnations, flower color exhibits codominance. When crosses, Red (R) and white (W) flowers make speckled flowers (RW) that show both colors.
Complete a cross between 2 speckled flowers and find the genotype ratio.

0 RR: 4 RW: 0 WW

2 RR: 2 RW: 0 WW

1 RR: 2 RW: 1 WW

0 RR: 2 RW: 2 WW

23.

What percentage of the offspring will have this recessive disease?

25%

50%

75%

24.

What percentage of the female offspring will be a carrier for this recessive disease?

50%

100%

25%

25.

I have 2 X chromosomes. What am I?

Male

Female

26.

I have 1 X chromosome and 1 Y chromosome. What am I?

Male

Female

27.

Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?

X^HX^h

X^hX^h

X^HX^H

X^hY

28.

Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?

X^HX^h

X^hX^h

X^HY

X^hY

29.

H= normal blood clotting

h=hemophilia

X^HX^h x X^HY

What is the probability that any of their offspring will have hemophilia?

4/4

3/4

2/4

1/4

30.

Colorblindness is a sex-linked recessive disorder. A normal woman whose father was colorblind marries a man with normal color vision. What percentage of their sons will be colorblind?

25%

50%

100%

31.

What percentage of the female offspring will be a carrier for this recessive disease?

50%

100%

25%

32.

Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?

X^HX^h

X^hX^h

X^HX^H

X^hY

33.

If the offsprings have the blood groups O and A the genotype of parents would be

I^AI^A and I^Ai

I^A i and ii

I^AI^A and I^AI^A

I^A i and I^Bi

34.

What are the blood types of the possible children that a woman (type O) and man (type AB) can have?

O and AB

O and A

O and B

A and B

35.

If a person has type B blood, the phenotype is B. What can the genotype be?

I^BI^B or I^Bi

I^AI^A or I^Ai

I^AI^B

36.

If a person has type A blood, the phenotype is A. What can the genotype be?

I^BI^B or I^Bi

I^AI^A or I^Ai

I^AI^B

37.

What type of inheritance is determined by multiple genes and there can be a range of traits?

Codominance

Incomplete dominance

Polygenic traits

38.

A single gene has 3 or more alleles. These are called

multiple genes

multiple alleles

codominance

polygenic traits

39.

This law describes how each member of a homologous pair is pulled randomly to one side or another in anaphase I

Law of Segregation

Law of Independent Assortment

Law of Gravity

Law of Mathematical Order

40.

This law describes how each homologous pair separates independently of any other pairs during Anaphase I of meiosis

Law of Segregation

Law of Independent Assortment

Law of Gravity

Law of Mathematical Order

41.

The exchange of pieces of chromatin between homologous chromosomes during Prophase I of meiosis is called

independent assortment

mutation

crossing over

random fertilization

42.

Which process is shown in the image?

crossing over

independent assortment

segregation

mutation

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Mendel Genetics

Total questions: 42

Worksheet time: 1hrs 11mins

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