Free Printable SY-3-Inheritance Pattern

Worksheets

SY-3-Inheritance Pattern

Total questions: 20

Worksheet time: 17mins

Name

Class

Date

Two traits are blended or create a "new" trait

complete dominance

incomplete dominance

codominance

Both traits show up in the offspring

complete dominance

incomplete dominance

codominance

Alternate forms of a gene are called

Chromosomes

Alleles

Gametes

Heterozygotes

Only one ________ allele is needed in order for that trait to be expressed in the phenotype.

Recessive

Dominant

Heterozygous

Homozygous

Which of the following genotypes is homozygous recessive?

The genotype TT is

Homozygous recessive

Homozygous dominant

Heterozygous

Which of the following genotypes is heterozygous?

Brown eyes (B) are dominant over blue eyes (b). Mr. Mallin has blue eyes. What is his genotype?

Brown eyes (B) are dominant over blue eyes (b). Assume Mr. Ward is homozygous dominant for brown eyes. What is his son’s phenotype?

Brown eyes

Blue eyes

10.

Free earlobes (E) are dominant over attached earlobes (e). Ms. Palmeri’s phenotype is free earlobes and her genotype is heterozygous (Ee). Which of these statements is true?

Both of her parents have attached ear lobes

At least one of her parents has free earlobes

Both of her parents are homozygous recessive

11.

How are Incomplete Dominance and Co Dominance different than a normal Mendelian cross?

There is no difference

The heterozygous genotype has a unique phenotype

There is no heterozygous genotype

There is only one phenotype regardless of genotype.

12.

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

Incomplete Dominance

Co dominance

Independent assortment

Recessive inheritance

13.

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

hidden allele

dominant allele

recessive allele

present allele

14.

This type of inheritance pattern shows BOTH traits in possible offspring

complete dominance

incomplete dominance

co-dominance

dominant pattern

15.

A gene that is controlled by more than two alleles

MULTIPLE ALLELES

PLEIOTROPY

16.

Pattern of heredity in which both alleles are simultaneously expressed in the heterozygote

CODOMINANCE

MULTIPLE ALLELES

17.

Genotype refers to the ...

physical expression of the genes

the possible combination of alleles in a gene

whether an allele is dominant or recessive

how an organism will appear

18.

What is a phenotype

The genetic make up (code)

The physical trait

19.

What are the possible genotypes for this cross?

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

all tall

TT= 75% tt = 25%

Tt = 100%

20.

Polygenic Inheritance

an inheritance pattern in which an offspring’s phenotype is a

combination of the parent’s phenotypes

an inheritance pattern in which both alleles can be observed in a phenotype

an inheritance pattern in which multiple genes determine the

phenotype of a trait

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SY-3-Inheritance Pattern

Total questions: 20

Worksheet time: 17mins

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