Bio 30 Chap 18 Monohybrid Cross Quiz

What is another way of saying "purebred"?

• homozygous
• dominant
• recessive
• heterozygous

Tags

NGSS.HS-LS3-1

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

• TT
• Tt
• tt
• tT

Tags

NGSS.HS-LS3-1

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

• 0 %
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

B=brown eyes
b= blue eyes
What is true about these two brothers that have brown eyes:
One has genotype BB the other Bb.

• they have same phenotype and genotype
• they have different genotypes and phenotypes
• they have same phenotype but different genotypes
• they have same genotype but different phenotypes

Tags

NGSS.HS-LS3-2

How can two parents with brown eyes have a child with blue eyes?

• The parents may both have recessive genes for blue eyes.

• The child was born during the winter

• Eye color in humans is not an inherited trait

• Both parents are homozygous

T = tall an t = short
TT and Tt would result in  the following phenotype

• short
• tall
• medium sized
• neither tall or short

Tags

NGSS.HS-LS3-1

If a heterozygous tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring?

• 100% Tt
• 50% Tt, 50% tt
• 75%Tt, 25%tt
• 25%TT, 50%Tt, 25%tt

Donkey and the fire-breathing dragon have lots of babies.  If breathing fire is a recessive trait (f), what must be Donkey’s genotype if they have a baby that breathes fire?

• FF
• ff
• Ff
• F

What are the possible genotypes for this cross?

• TT = 25% Tt= 50% tt=25%
• all tall
• TT= 75% tt = 25%
• Tt = 100%

Tall is dominant to short. A homozygous tall plant is crossed with a short plant. What will be the phenotypes of the offspring?

• 100% tall
• 50% tall, 50% short
• 75% tall, 25% short
• 25% tall, 75% short