Genetics Unit Test Review

The Basics

100

Who is considered the "Father of Genetics"?

Gregor Mendel

200

What did Gregor Mendel mainly experiment with for his genetics research?

Breeding of Pea Plants

300

What do you cross to come up with the Second Filial (of F2) generation?

Two individuals from the First Filial (or F1) generation

400

How many pea plant traits did Gregor Mendel focus on for his research?

Seven (7)

500

Gregor Mendel kept finding the same result with his F2 generation... for every ________ showing the dominant trait, there was/were ________ showing the recessive trait.

3 dominant.... 1 recessive (3:1 ratio)

Simple Dominance

100

How many dominant alleles are needed for the dominant trait to show?

One (1)

200

How many recessive alleles are needed for the recessive trait to show?

Two (2)

300

Purple flowers are dominant to white. If a pure purple plant is crossed with a pure white, what percent of offspring will be heterozygous?

100%

400

Purple flowers are dominant to white.  If two heterozygous plants are crossed, what percent of offspring will be pure white?

25%

500

Purple flowers are dominant to white.  If two heterozygous plants are crossed, what percent of offspring will be carriers for white flowers?

50%

Complex Genetics

100

This additional factor (such as temperature, light exposure, etc.) can work along with genotype to create a wider range of phenotypes.

Environment

200

This type of trait, which involves several genes working together, can create a wider range of possible phenotypes.

Polygenic Trait

300

Human ABO blood groups are a classic example of this type of inheritance.

Multiple Alleles

400

Mice can have three possible fur colors - all black, all beige, and a blended light grey color. What type of inheritance pattern is involved?

Incomplete Dominance

500

This type of gene has an ability to override or interfere with the expression of other genes.

Epistatic Gene

Classify the genotype!

100

bb

homozygous recessive

200

Aa

Heterozygous

300

C^B C^B 

(where B stands for brown fur)

Homozygous brown fur

400

I^A i

Heterozygous type A

500

X^F X^f

Heterozygous female

What's the phenotype?

100

Bb

Brown eyes (B) are dominant to blue eyes (b)

Brown eyes

200

C^R C^Y

Codominance, R=red flowers and Y=yellow flowers

Red and Yellow Flowers

300

I^B i

Type B blood

400

C^B C^W

Incomplete Dominance, B=black fur and W=white fur

Grey fur

500

X^r Y

R=red eyes, r=white eyes

white-eyed male