Free Printable 3.4 IB Pedigrees

Worksheets

3.4 IB Pedigrees

Total questions: 20

Worksheet time: 25mins

Name

Class

Date

Which best explains why individual IV-7 has colorblindness?

Because her mom is a carrier and her dad has the gene

Because her dad has it.

Because her siblings have it.

Because her uncle has it.

If the affected female in Generation 3 mates with an affected male. What will be their offspring's genotype?

50% Hybrid/50% Purebred

100% Homozygous Dominant

100% Homozygous Recessive

100% Heterozygous

There are no carriers for Huntington's Disease - you either have it or you don't. Is Huntington's disease caused by a dominant or recessive trait?

Dominant

Recessive

Co-dominant

Incompletely dominant

Is it possible for individual IV-2 to be a carrier? Why?

No, because her parents don't have the trait.

No, because she doesn't have the trait.

Yes, because her siblings have it.

Yes, because her parents are carriers.

Give the genotype for person II-1, for this autosomal trait.

we cannot be 100% sure of the genotype

If hemophilia is a sex-linked recessive trait, what genotype would individual III-3 have?

X^hX

X^hX^h

X^hY^h

X^hY

The pedigree chart below shows the blood types of three members of a family. What could be the blood types of individuals 1 and 2?

1= A 2= AB

1=AB 2=A

1=O 2=AB

1=B 2=A

The blood groups of a mother and 4 children are indicated on the pedigree chart below. What are the possible blood groups of the father?

Group A only

Group A or B only

Group AB only

Group A, B or AB only

What type of inheritance is shown in this pedigree chart?

X-linked dominant

Y-linked dominant

X-linked recessive

Y-linked recessive

10.

What evidence is given in the pedigree chart below to establish that the condition is caused by a dominant allele?

Two unaffected parents have unaffected children

Two affected parents have affected children

An affected parent and an unaffected parent have affected children

Two affected parents have an unaffected child

11.

What is the mode of inheritance shown here?

Autosomal Dominant

Autosomal Recessive

Sex Linked Recessive

12.

What is the mode of inheritance shown here?

Autosomal Dominant

Autosomal Recessive

Sex Linked

13.

What type of inheritance is shown in this pedigree?

Autosomal dominant

Autosomal recessive

Sex-linked dominant

Sex-linked recessive

14.

What type of inheritance is shown?

Sex linked dominant

Sex linked recessive

Autosomal dominant

Autosomal recessive

15.

What type of inheritance is shown?

Sex linked dominant

Sex linked recessive

Autosomal dominant

Autosomal recessive

16.

What type of inheritance is shown?

Sex linked dominant

Sex linked recessive

Autosomal dominant

Autosomal recessive

17.

What type of inheritance is shown?

Sex linked dominant

Sex linked recessive

Autosomal dominant

Autosomal recessive

18.

If the trait is depicted by the letters T and t, what is the genotype of individual III-2?

TT or Tt

19.

What is the genotype of the F₁ male?

X^RY

X^rY

X^RY^r

X^RY^R

X^rY^r

20.

What is the genotype for individual III-7?

X^GX^G

X^gX^g

Reset

3.4 IB Pedigrees

Total questions: 20

Worksheet time: 25mins

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