Free Printable Genetics

Worksheets

Genetics

Total questions: 27

Worksheet time: 18mins

Name

Class

Date

genetics is the study of __________

heredity

genetics

parents

TT; big letters are ___________

recessive

dominant

nothing

tt, small letters are ______

DNA

dominant

recessive

a ___________ is a letter combination of an allele

phenotype

genotype

dominant

recessive

a __________- is the trait that we see; black, long, blue, tall

DNA

recessive

genotype

phenotype

Tt, Hh, Rr

homozygous

heterozygous

recessive

phenotypes

TT, RR, WW, SS

homozygous recessive

homozygous dominant

heterozygous

recessive

rr, tt, hh, gg

homozygous dominant

heterozygous

homozygous recessive

strong

G = green, g = yellow
The genotype for a yellow plant is...

all of the choices result in yellow

10.

Term for an organism that display two dominant phenotypes at the same time

codominance

incomplete dominance

multiple alleles

linked genes

11.

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

12.

Codominance occurs in calico cats, which allows for the Black and Tan colors to show. What percentage of the offspring represented in this P square will be calico (black and tan spotted)?

25%

50%

75%

100%

13.

Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be black?

100

14.

What are the female chromosomes?

15.

What are the male chromosomes?

16.

In fruit flies, eye color is a sex-linked trait. Red (R) is dominant to white (r).

Which genotype shows a female fly with white eyes?

$X^{R^{ }}X^r$

$X^RX^R$

$X^rX^r$

17.

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

X^BX^b

X^bX^b

X^bY

X^BY

18.

What is the likelihood of this cross have a child that is colorblind?

100%

75%

50%

25%

19.

What chance will a boy will be colorblind?

100%

50%

25%

20.

Who is more likely to have an X-linked trait?

Males

Females

Both males and females

21.

What does a filled in square represent?

Not affected Female

Not affected Male

Affected Male

Affected Female

22.

How many generations are shown in this pedigree?

23.

How many kids did the mother and father from the first generation have?

24.

How many people in this whole pedigree have the trait/disease?

25.

This is a recessive disease pedigree. What is the genotype of the female in generation II?

26.

This is a recessive disease pedigree. What is the genotype of the male in generation I?

27.

This is the recessive disease pedigree. What is the genotype of the oldest male in generation II? (oldest is on the left)

Reset

Genetics

Total questions: 27

Worksheet time: 18mins

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