Genetics Vocabulary Review

Genetics Vocabulary
Practice

Phenotype vs. Genotype

Genotype:

● The genes/alleles

an organism has

● Examples:

○ RR
○ Ww
○ hh

Phenotype:

● The physical

appearance of an
organism

● Examples:

○ Right-handed
○ Widow’s peak
○ Cleft chin

Categorize

Options (10)

aa

Zz

Widow's peak hairline

TT

ff

GG

blue eyes

curly hair

attached earlobes

dimples

Identify the examples as genotypes or phenotypes

Genotypes

Phenotypes

Multiple Choice

Which of these is a genotype?

• Blue eyes

• B

• Bb

Describing Genotypes

We describe genotypes as:

● Homozygous or heterozygous
● Dominant or recessive

Homozygous vs Heterozygous

Heterozygous:

● The 2 alleles are

DIFFERENT

● Examples

○ Hh
○ Bb

Homozygous:

● The 2 alleles are the

SAME/ identical

● Examples:

○ hh
○ HH
○ BB
○ bb

Categorize

Options (10)

Bb

Cc

Ee

Ff

Hh

bb

CC

ee

FF

hh

Organize these options into the right categories

Homozygous

Heterozygous

Dominant vs Recessive

Recessive:

● A genotype with 2

lowercase letters

● Examples:

○ bb
○ hh

Dominant:

● A genotype with

an UPPERCASE
letter

● Examples:

○ BB, Bb
○ HH, Hh

Categorize

Options (15)

Aa

BB

EE

FF

HH

aa

bb

ee

ff

hh

AA

Bb

Ee

Ff

Hh

Identify the genotypes as dominant or recessive

Dominant

Recessive

We can use 2 words together to describe genotypes

AA= homozygous AND dominant

aa= homozygous AND recessive

Aa= heterozygous AND dominant

Categorize

Options (16)

BB

EE

FF

HH

aa

bb

ee

ff

hh

AA

This never happens!

Aa

Bb

Ff

Hh

Ee

Organize these options into the right categories

Homozygous Dominant

Recessive

Heterozygous Dominant

Heterozygous Recessive

Multiple Choice

Which of these genotypes is homozygous recessive?

• AA

• Aa

• aa

Multiple Choice

Which of these genotypes is homozygous dominant?

• AA

• Aa

• aa

Multiple Choice

Which of these genotypes is heterozygous dominant?

• AA

• Aa

• aa