Monohybrid Dihybrid

What goes in box 6

• AaBB

• AABB

• aaBB

• AAbb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In rabbits, black fur (B) is dominant to brown fur (b). Consider the following cross between two rabbits.

What is the phenotype of the offspring in box 3?

• Brown

• Black

• A mixture of brown and black

• None of the above

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the difference between a monohybrid and a dihybrid cross?

• A monohybrid cross produces a single offspring, whereas a dihybrid cross produces two offspring

• A monohybrid cross involves a single parent, whereas a dihybrid cross involves two parents

• A monohybrid cross involves only one heterozygous parent whereas a dihybrid cross involves both heterozygous and homozygous parents

• A monohybrid cross predits the outcome of one trait whereas a dihybrid cross predicts the outcome of two traits

What is the genotypic ratio represented by the punnett square?

• 1:1

• 3:1

• 1:3

• 1:2:1

The allele for having a bent pinky finger is dominant to the allele for having a straight pinky finger. If two people who are both heterozygous for the trait of a bent pinky finger have a child, what is the percent probability that the child will have straight pinky fingers?

• 0%

• 25%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What is the expected genotypic ratio resulting from a heterozygous x heterozygous monohybrid cross?

• 2:1

• 3:1

• 1:2

• 1:0

In a genetics laboratory, two heterozygous tall plants are crossed. If tall is dominant over short, what are the expected phenotypic results?

• 100% Tall

• 50% Tall, 50% Short

• 75% Tall, 25% Short

• 25% Tall, 75% Short

Tags

NGSS.HS-LS3-3

What are punnett squares used for?

• Predicting the possible offspring of two parents

• Determining the alleles of a specific gene

• Identifying dominant and recessive traits

• Determining an individuals genotype

In guinea pigs, the allele for rough coat (R) is dominant to the allele for smooth coat (r). A rough coat male and a smooth coat female mate. They produce several offspring - 50% are rough coat and 50% are smooth coat. What are the genotypes of the parents?

• RR x rr

• RR x Rr

• Rr x rr

• Rr x Rr

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If a pea plant has one recessive allele for green peas, what conditions will allow for the green phenotype to appear?

• Green peas will only appear if the dominant yellow allele is present

• Green peas will always appear regardless of the other allele

• Green peas will only appear if the dominant yellow allele is not present

• Green peas will never appear regardless of the other allele

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2