Free Printable Mendelian Genetics

Worksheets

Mendelian Genetics

Total questions: 35

Worksheet time: 56mins

Name

Class

Date

What is the percentage of homozygous recessive offspring?

25%

50%

75%

Green peas are dominant (G) to yellow peas (g). What is the genotype for a hetereozygous dominant offspring?

In Mendel's pea plants, the homozygous recessive phenotype was white flowers. If Mendel crossed two homozygous recessive pea plants, what color flowers would be seen in the offspring?

white and purple

white

purple

lavendar

What percentage of the offspring will be purebred dominant?

25%

50%

75%

Dominant alleles are represented by a(n)

phenotype

lower case letter

upper case letter

punnett square

True or False:
A heterozygous dominant trait can be written as BB.

True

False

D = dimples d = no dimples
What is the genotype for a homozygous recessive offspring?

What is the percentage of a homozyogus dominant offspring?

75%

50%

25%

Round (R) seeds are dominant to wrinkled (r) seeds.
What is the genotype for a homozygous dominant offspring?

10.

What do you call the physical expression of a gene?

genotype

dominant

phenotype

allele

11.

Short hair (S) is dominant to long hair (s).
What is the genotype for an offspring with long hair?

12.

What percentage of the offspring will be heterozygous dominant?

100%

75%

50%

25%

13.

Passing on traits from parents to offspring

Chromosome

Genotype

Heredity

Allele

14.

The study of heredity

Genetics

Genome

Allele

Punnett Square

15.

During meiosis and gamete formation, homologous (paired up) alleles split up

Phenotype

Law of Segregation

Genotype

Dihybrid Cross

16.

During meiosis, the homologous pairs of chromosomes and the matching alleles are lined up independently.

Offspring are a mix of maternal genes and paternal genes.

This increases genetic variation.

Homozygous Dominant

Law of Segregation

Crossing Over

Independent Assortment

17.

Synonymous (same) name for heterozygous:

heredity

homozygous

hyperactive

hybrid

18.

Which term refers to an organism's physical appearance

recessive allele

dominant

genotype

phenotype

19.

If one parent is heterozygous, what does that mean? Choose all that apply.

One dominant allele, one recessive allele

It means they are a hybrid

They have one capital letter and one lowercase letter as symbols

They can pass on either allele

20.

This little guy has a recessive trait. Choose the best statement.

Both parents gave him an "h". (hh)

He has one "H" and one "h".

He will die without hair.

He is a baby and his hair will grow in a few more days.

21.

Mendel concluded that alleles for tall pea plants is dominant. If you cross a TT with a Tt, how many plants would be tall?

50%

100%

25%

75%

22.

Different forms of a gene are called ______.

alleles

traits

genotype

phenotype

23.

A puppy is homozygous for fur color. This statement describes the rabbit's _____

phenotype

genotype

acquired trait

biological classification

24.

In the Punnett square what is the probability that flowers will have a white flower?

3 in 4

1 in 4

2 in 4

4 in 4

25.

The parent flowers could both be described as ____

homozygous recessive

homozygous dominant

heterozygous

phenotypes

26.

In snapdragons, Tallness (T) is dominant to dwarfness (t). In a cross between two plants that are homozygous for the recessive allele, the percent of offspring expected to exhibit tallness is

25%

75%

100%

27.

If a pea plant were homozygous recessive for height, how would its alleles be represented?

28.

If this image were real, it would represent what type of inheritance?

incomplete dominance

codominance

polygenic inheritance

compete dominance

29.

A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers?

25%

50%

100%

30.

Aa, DD, bB, yy are all examples of

genotypes

phenotypes

31.

Aa, DD, bB, yy are all examples of

genotypes

phenotypes

32.

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

33.

What do you call the non-Mendelian inheritance pattern that states that neither trait is dominant and the traits appear to blend together?

Codominance

Incomplete dominance

Polygenic traits

34.

In some carnations, flower color exhibits codominance. When crosses, Red (R) and white (W) flowers make speckled flowers (RW) that show both colors.
Complete a cross between A speckled flower and a red flower. Find the phenotype ratio.

2 red: 2 speckled: 0 white

4 red: 0 speckled: 0 white

0 red: 4 speckled: 0 white

0 red: 2 speckled: 2 white

35.

A roan cow shows co-dominance in fur color (orange and white). What is the phenotype ratio expected if a roan cow and a roan steer mate together?

4: Orange and White

1: Orange : 1 White

2 Orange: 2 Orange and White: 0 White

1: Orange: 2 Orange and White: 1 White

Reset

Mendelian Genetics

Total questions: 35

Worksheet time: 56mins

Similar Resources on Wayground