Free Printable Genetics Mixed Problems #1

Worksheets

Genetics Mixed Problems #1

Total questions: 20

Worksheet time: 2hrs 33mins

Name

Class

Date

The outward characteristics that people show due to their genetics....

Homozygous

Heterozygous

Genotype

Phenotype

Brown is dominant to green. What is the probability of these parents having green offspring?

25%

50%

75%

100%

What would go into punnet square 1

all choices

What is the genotypic ratio here?

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

TT = 100%

TT= 75% : tt = 25%

Tt = 100%

The genotype of this flower is....

homozygous recessive

heterozygous

homozygous dominant

white

If Albinism is a recessive trait represented by (a), what is the percentage of offspring will be Albino?

25%

50%

75%

100%

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

incomplete dominance

co-dominance

Mendelian dominance

complete dominance

Incomplete dominance or co-dominance?
A calico cat shows both the traits for orange fur and black fur.

Incomplete Dominance

Co-dominance

Complete dominance

Mendelian dominance

A breed of chicken shows co-dominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be....

all black

all white

all gray

speckled black and white

10.

Normal red blood cells (rbc's) are bi-concave disks; sickle cells are abnormal. An individual can have both normal and sickle cells. What type of trait describes rbc shape?

Incomplete dominance

Co-dominance

Mendelian dominance

Complete dominance

11.

A man with type O blood is accused of being the father of a type B baby. The mother is type A. Could this man be the father?

Yes

Maybe

12.

Ged is blood type A and Linda is blood type B. How can they have children who are types AB, and O?

Alleles A and B are co-dominant, but allele O is recessive

Alleles A and B are incompletely dominant, but allele O is recessive

Alleles A and B are co-dominant, but allele O is completely dominant

Alleles A and B are incompletely dominant, but allele O is completely dominant

13.

Orange or black fur is a single, X-linked, co-dominant trait in cats. Calico cats have white fur with patches of orange and black. Is it true that calico cats can only be female?

Yes, because they have 2 'X' chromosomes, and therefore can have both the orange and black alleles (X^RX^B)

No, males can be calico because they can have both the alleles for orange and black (X^RY^B)

Yes because the trait is found on the X chromosome (X^RBX)

No, males can be calico because the trait is found on the X chromosome (X^RBY)

14.

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

X^NY^N

XⁿYⁿ

X^NY

XⁿY

15.

Males are more likely to suffer from a sex-linked disease or disorder because...

males are the weaker sex

males have less DNA

males have 1 X chromosome, so the disorder is more likely to be expressed

females are the stronger sex

16.

Duchenne muscular dystrophy is a recessive sex-linked disorder.

If a couple without the disorder had a child with the disorder, which of the following is true? (2 answers)

Both parents are heterozygous for the disorder

The mom is heterozygous for the disorder

The dad is heterozygous for the disorder

The child can only be a boy

The child can only be a girl

17.

Which of the following genotypes belongs in the red box in the Punnett square, and what would the genotype be for the trait?

X^BX^b- female heterozygous

X^bX^b- female homozygous recessive

X^BX^B - female homozygous dominant

X^bY - male heterozygous recessive

18.

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

I^BI^B

I^AI^B

I^Bi

iI^B

19.

Suhitha is blood type B and Kieran is blood type A. How can they have children who are types A, B, AB, and O?

Suhitha: I^BI^B

Kieran: I^AI^A

Suhitha: I^BI^B

Kieran: I^Ai

Suhitha: I^Bi

Kieran: I^Ai

Suhitha: I^Bi

Kieran: I^AI^A

20.

Which of the following are co-dominant traits (3)

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Genetics Mixed Problems #1

Total questions: 20

Worksheet time: 2hrs 33mins

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