Genetics

An individual has the phenotype Bb. Will they express the dominant or recessive trait?

• Recessive

• Dominant

Which of the following alleles is homozygous (purebred) recessive?

• Tt

• tt

• TT

• t

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

• GG

• Gg

• gg

• all of the choices result in yellow

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

T = tall an t = short
What is the phenotype for Tt?

• short

• tall

• medium sized

• neither tall or short

Tags

NGSS.MS-LS3-1

NGSS.MS-LS3-2

What goes in box 3

• Aabb

• AABB

• AAbb

• aaBb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Cross Two Homozygous plants
(RRYY x rryy)
R = round seeds, r  = wrinkled seeds Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds? 

• 0%
• 25%
• 50%
• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the genotype for a pea plant heterozygous for round seeds (R), and homozygous recessive for green seeds (y)?

• Ry
• RRyy
• RrYy
• Rryy

Tags

NGSS.HS-LS3-2

Using the dihybrid cross and key provided, what is the probability of the offspring being tall and white?

• 9

• 2

• 3

• 6

Traits that display intermediates, or blended variations, have alleles of ______ ______.

• incomplete dominance

• co-dominance

• recessive

• polygenic inheritance

Traits in which 2 alleles are BOTH dominant at the same time are BOTH expressed, are said to be ________.

• co-dominant

• incomplete dominant

• sex-linked recessive

• recessive