Genetics/Punnet Squares

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

A cross of a red cow (RR) with a white bull (WW) produces a roan (red & white) offspring (RW) 100% of the time. What type of inheritance is this?

• multiple alleles

• codominance

• complete dominance

• incomplete dominance

Which of the following best describes both parents in the punnett square?

• Black

• Brown

• Homozygous dominant

• Homozygous recessive

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

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?

ABCD

• 0%

• 25%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Which is the best model of meiosis and why?

• Diagram B because 4 genetically identical diploid cells are produced.

• Diagram A because 2 genetically different diploid cells are produced.

• Diagram A because 2 genetically identical haploid cells are produced.

• Diagram B because 4 genetically different haploid cells are produced.

Tags

NGSS.HS-LS3-2

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

In chickens, feather color shows codominance. A black and white spotted chicken is considered to be "erminette."

(Goes with All erminette chicken questions)

What would be the resulting phenotype ratio of the offspring produced in a cross between two erminette chickens?

• 1:0

• 4:0

• 1:2:1

• 1:1

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What would be the phenotype percentages of a cross between a black chicken and an erminette chicken?

• 50% black, 50% erminette

• 25% black, 50% erminette, 25% white

• 50% black, 50% white

• 100% black

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

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

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