Free Printable 6.2: Codominance & Multiple Alleles

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6.2: Codominance & Multiple Alleles

Total questions: 43

Worksheet time: 1hrs 7mins

Name

Class

Date

The different forms of a gene are called ---

traits

hybrids

alleles

A condition in which both alleles for a gene are expressed so that both traits are visible is known as

Codominance

Incomplete dominance

Complete dominance

A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?

Incomplete Dominance

Codominance

Complete Dominance

Recessive inheritance

A roan cow shows codominance in fur color (red and white). What is the phenotypic ratio expected if a roan cow and a roan steer mate together?

4 (Red and White)

1:1 (Red to White)

2:2 (Red to Red and White)

1:2:1 (Red to Red and White to White)

An allele whose trait only shows up when NO dominant allele is present.

hidden allele

dominant allele

recessive allele

present allele

Some flowers are controlled by codominance. Red flowers (C^RC^R), blue flowers (C^BC^B), and red/blue speckled flowers (C^BC^R).

Cross a red flower with a speckled flower. What is the phenotypic ratio?

2:2 or 1:1 (red:speckled)

2:2 or 1:1 (red:blue)

2:2 or 1:1 (blue:speckled)

1:2:1 (red:speckled:blue)

Some flowers are controlled by codominance. Red flowers (C^RC^R), blue flowers (C^BC^B), and red/blue speckled flowers (C^BC^R).

Cross two speckled flowers. What are the possible results in the offspring/progeny?

1 red, 2 speckled, 1 blue

2 red, 2 blue

2 blue, 2 speckled

1 red, 1 speckled, 2 blue

In cattle, red coats are represented as C^RC^R, and white coats are represented as C^WC^W.

What is the genotype for Roan color?

C^RC^R

C^RC^W

C^WC^W

This image is an example of

codominance

dominance

incomplete dominance

complete dominance

10.

Blood types in humans are an example of traits controlled by __________.

A)multiple alleles

B)offspring

C)only homozygous parents

D)pedigree

11.

This type of inheritance pattern shows BOTH traits in possible offspring

complete dominance

incomplete dominance

co-dominance

dominant pattern

12.

What type of inheritance pattern is shown here?

Codominance

Incomplete dominance

13.

Which of the following are possible human blood types? (check all that apply)

14.

The blood type that is the universal donor because anyone can receive it is

15.

A person with a Type A Phenotype would have what potential genotypes?

I^AI^A

I^Ai

I^AI^B

16.

A person with a Type AB Phenotype would have what potential genotypes?

I^BI^B

I^Bi

I^AI^B

17.

A person with a Type O Phenotype would have what potential genotypes?

I^BI^B

I^Bi

I^AI^B

18.

What is the Genotype for Homozygous "B" allele

IᴬIᴮ

Iᴮi

IᴬIᴬ

IᴮIᴮ

19.

A person with a Type B Phenotype would have what potential genotypes?

I^BI^B

I^Bi

I^AI^B

20.

------is the combination of two alleles that are different from one another.

homozygous

heterozygous

phenotype

trait

21.

A man with type O blood has children with a woman who is heterozygous for type A blood. What is the probability that their children will have type A blood?

25%

50%

75%

22.

Suppose that a mother has blood Type A and genotype I^Ai and the father has blood Type B and genotype I^Bi. Draw a Punnett square to find the possible genotypes of their children.

What are the possible phenotypes of the kids? (select all that apply)

Type A

Type B

Type AB

Type O

23.

Which of the following alleles is dominant?

I^A is dominant over i

I^B is dominant over i

i is the dominant allele

24.

Which of the following alleles is recessive?

I^A

I^B

I^A and I^B

25.

If a father is AA and a mother is AB, what is the probability for a child with AB blood?

25%

50%

75%

26.

If one of your parents is blood type A and the other is type B, which of the following blood types would you likely be?

A or B

Any

27.

What is NOT a possible genotype for someone with type B blood?

28.

What is the genotype of a person with type A blood, who had a father with type O blood?

29.

A woman has type B blood and her husband has type O blood. What must be the woman's genotype, if they have a child with type O blood?

30.

The physical appearance of an organisms is its

Genotype

Phenotype

characteristic

Heterozygous

31.

The different forms of a gene are called

traits

pollinators

alleles

hybrids

32.

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

multiple genes

multiple alleles

codominance

polygenic traits

33.

AB blood type is an example of what type of inheritance? Both alleles show in the phenotype

complete dominance

incomplete dominance

codominance

polygenic inheritance

34.

Homozygous is when...

the alleles are the same

the alleles are different

the alleles are absent

the alleles are present

35.

If a father is AA and a mother is AB, what is the probability for a child with AB blood?

25%

50%

75%

36.

If two parents have type AB blood, what is the probability that their child will have type O blood?

25%

50%

100%

37.

For the square that has OO in the bottom right. What would be the missing allele on the top? (A ____ )

38.

Even there are several different sources of alleles, each trait ONLY contains

3 or more alleles from the top of family tree

2 alleles, one from mom and one from dad

one allele, from the gene of the dominant parent

39.

Both traits are showing up in the offspring phenotypes

codominance

dominant traits

incomplete dominance

Mendel genetcs

40.

blood type AA x blood type BB= type AB in offspring blood type

codominance

incomplete dominance

dominant and recessive genes

41.

Which of the following is purebred?

Both AA and oo

42.

Which of the following is a hybrid?

43.

If two parents are heterozygous for type A blood, what is the probability that their offspring would have type O blood?

100 %

75%

50%

25%

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6.2: Codominance & Multiple Alleles

Total questions: 43

Worksheet time: 1hrs 7mins

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