Free Printable sex-linked, codominance, multiple alleles, dihybrid crosses

Worksheets

sex-linked, codominance, multiple alleles, dihybrid crosses

Total questions: 60

Worksheet time: 29mins

Name

Class

Date

What gamete possibilities could come from this parent's genotype?

AB, AB, aB, aB

Ab, AB, Ab, ab

Ab, Ab, Ab, Ab

AB, aB, ab, aB

What goes in box 3

Aabb

AABB

AAbb

aaBb

What genotype is missing from this Punnett Square?

RrYy

RRYY

rryy

RrYY

Based off this punnett square, what fraction of the offspring will have wrinkled, yellow seeds?

9/16

3/16

1/16

16/16

A male beetle has the genotype Ttbb. If this beetle mates with a female with genotype TTBb, what is the chance their offspring will have the genotype TtBb?

3/16

4/16

8/16

12/16

Aa, DD, bB, yy are all examples of

genotypes

phenotypes

Which of the following genotypes is heterozygous?

Which of the following genotypes is homozygous dominant?

This image is an example of a _____________ cross.

Monohybrid

Dihybrid

Purebred

Pure Breeding

10.

An organism’s genetic makeup, or allele combinations

Recessive

Genotype

Phenotype

Heterozygous

11.

Cross Two Homozygous plants
(RRYY x rryy)
R = round seeds, r = wrinkled seeds Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds?

25%

50%

100%

12.

What proportion of the offspring in Figure 11-4 would be expected to have white, smooth hair?

9/16

3/16

4/16

1/16

13.

A white mouse with red eyes is crossed with a black mouse with brown eyes. The white mouse is recessive for both of its traits. The black mouse is dominant for both of its traits.

This cross would be

BBEE x bbee

BBEe x BbEe

BbEE x BbEe

BBee x BBEE

14.

What percent of the parakeets from this cross look like the first parent in P1?

15.

A white mouse with red eyes is crossed with a black mouse with brown eyes. The white mouse is recessive for both of its traits. The black mouse is dominant for both of its traits.

This cross would be

BBEE x bbee

BBEe x BbEe

BbEE x BbEe

BBee x BBEE

16.

In cacti, long arms (A) are dominant to short arms (a). Suppose 2 heterozygous cacti are crossed. What percentage of their offspring are expected to have short arms?

25%

75%

100%

17.

If a heterozygous tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring?

100% Tt

50% Tt, 50% tt

75%Tt, 25%tt

25%TT, 50%Tt, 25%tt

18.

Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?

100% Pp (purple)

50% Pp (purple); 50% pp (white)

75% Pp (purple); 25% pp (white)

25% PP, 50% Pp, 25% pp

75% purple, 25% white

19.

How can two parents with brown eyes have a child with blue eyes?

The parents may both have recessive genes for blue eyes.

The child was born during the winter

Eye color in humans is not an inherited trait

The child was deprived of oxygen during its birth

20.

Donkey and the fire-breathing dragon have lots of babies. If breathing fire is a recessive trait (f), what must be Donkey’s genotype if they have a baby that breathes fire?

21.

What is the correct prediction when crossing a homozygous dominant parent with a homozygous recessive parent in a dihybrid cross?

75% dominant, 25% recessive

1:2:1

9:3:3:1

100% heterozygous

22.

What is the correct phenotype ratio when crossing two heterozygous parents in a dihybrid cross?

100% heterozygous

1:2:1

3:1

9:3:3:1

23.

Determine the probability that an Aa individual will be produced from an Aa x Aa cross

25%

100%

50%

75%

24.

Mike has type O+ blood. Mike is a Universal Recipient.

True

False

25.

Jim has type AB blood. His dad could be type O.

True

False

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.

Blood type is determined by the antigens.

True

False

28.

What is the genotype for someone who has Type AB blood?

I^Ai

I^AI^B

I^Bi

29.

What is the probability of a person who is Type O blood and a person who is Type AB blood having a kid who is Type A Blood?

25%

50%

75%

100%

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.

Hemophilia is a sex-linked recessive disorder. A woman with hemophilia marries an unaffected man whose father had hemophilia. What percentage of their daughters will have hemophilia?

25%

50%

100%

32.

Colorblindness is a sex-linked recessive disorder. If the daughter of a couple is colorblind, what are the two possible genotypes of her mother?

X^AX^A and X^AX^a

X^AX^A and X^aX^a

X^AX^a and X^aX^a

Cannot be determined

33.

If a trait shows up more commonly in men than women it is probably

not inherited

on the x chromosome and dominant

on the x chromosome and recessive

on a normal body chromosome

34.

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

35.

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

X^HX^h

X^hX^h

X^HY

X^hY

36.

Colorblindness is a recessive x-linked disorder.
Which genotype represents a male with normal vision?

X^NX^N

XⁿXⁿ

X^NY

XⁿY

37.

Which of the following genotypes belongs in the red box in the Punnett square?

X^BX^b

X^bX^b

X^bY

X^BY

38.

Vitamin D resistant rickets (deformed bone formation) is a sex-linked DOMINANT trait. According to the Punnett square, what percentage of female offspring will have the disorder?

25%

50%

100%

39.

The blending of two traits is known as ---

incomplete dominance

codominance

40.

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

Codominance

Incomplete dominance

41.

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

Incomplete dominance

Codominance

42.

This is an example of ---

Incomplete dominance

Codominance

43.

This is an example of ---

Incomplete dominance

Codominance

44.

What does this Punnett square and the probabilities of the ofspring represent?

incomplete dominance

codominance

45.

A woman with curly hair and a man with straight hair produced a child with wavy hair:

Incomplete dominance

Codominance

Complete dominance

46.

Some flowers are controlled by codominance. Red flowers (F^RF^R), blue flowers (F^BF^B) and Speckled flowers (F^RF^B).

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

50% red, 50% speckled

25% red, 25% blue

100% blue

47.

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 red (RR) flowers?

25%

50%

100%

48.

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%

49.

In some carnations, flower color exhibits codominance. Identify the correct genotypes for red, white, and speckled carnations.

Red = RR, white = rr, speckled = Rr

Red = RR, white = WW, speckled = rw

Red = RR, white = ww, Speckled = Rw

Red = RR, white = WW, speckled = RW

50.

Snap dragon color is a incomplete dominant trait. A red flower (RR) is crossed with white flower (rr)? What color are flowers that are Rr?

Red

Red and White

White

Pink

51.

Which of the following are genotypes for blood type B?

I^A I^Aand I^A I^B

I^B I^Band ii

I^B I^Band I^B i

I^A I^Band I^A I^B

52.

Which of the following is true about blood type O?

It contains antigen A only.

It contains antigen B only.

It contains both antigen A and antigen B.

It doesn’t contain antigen A or antigen B.

53.

A brown rooster and a white chickenproduced this speckled offspring:

Incomplete dominance

Codominance

Complete dominance

54.

A black male and white female produced this grey offspring:

Incomplete dominance

Codominance

Complete dominance

55.

A pink flower and a white flower produced this offspring:

Incomplete dominance

Codominance

Complete dominance

56.

A pink flower and a white flower produced this offspring:

Incomplete dominance

Codominance

Complete dominance

57.

A man with blue eyes and a woman with brown eyes produced a child with brown eyes:

Incomplete dominance

Codominance

Complete dominance

58.

Which of the following is NOT true of dominant genes?

Dominant genes are always expressed wherever they are present.

A dominant gene will overpower all other genes to be the only one expressed.

Two dominant genes can be expressed together in a situation of co-dominance.

None of the above.

59.

"The offspring's phenotype is an intermediate (blended) phenotype of the two parental phenotypes"

Incomplete dominance

Codominance

Complete dominance

60.

"The offspring's phenotype has independent and equal expression of both parental phenotypes"

Incomplete dominance

Codominance

Complete dominance

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sex-linked, codominance, multiple alleles, dihybrid crosses

Total questions: 60

Worksheet time: 29mins

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