LS 10c Punnett Squares and Genetics

Why are Punnett squares used in genetics?

• To predict the probability of offspring inheriting particular traits

• To measure the size of DNA molecules

• To identify the sequence of genes

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NGSS.HS-LS4-3

How many recessive alleles do you need in order for the recessive phenotype to show?

• 2

• 1

• 4

Who is known as the father of modern genetics?

• Charles Darwin

• Gregor Mendel

• James Watson

• Francis Crick

What does a capital letter represent in a genetic cross?

• A recessive allele

• A dominant allele

• A heterozygous allele

• A homozygous allele

What does a lowercase letter represent in a genetic cross?

• A dominant allele

• A recessive allele

• A codominant allele

• An incomplete dominant allele

If a homozygous dominant plant (TT) is crossed with a homozygous recessive plant (tt), what will be the genotype of the offspring?

• TT

• Tt

• tt

• TTT

Tags

NGSS.HS-LS3-1

In a monohybrid cross, what is the probability of obtaining a homozygous recessive offspring if both parents are heterozygous (Tt)?

• 1

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NGSS.HS-LS3-3

R is the dominant allele for red roses, r is the recessive allele for white roses. If I cross a purebred dominant plant with a purebred recessive plant, what would the offspring look like?

• All plants would be white

• All plants would be red

• 3 red to 1 white

• Half red and half white

Tags

NGSS.HS-LS3-1

If a heterozygous plant (Tt) is crossed with a homozygous recessive plant (tt), what is the probability of obtaining a heterozygous offspring?

• 1

Tags

NGSS.HS-LS3-3

Which of the following represents a homozygous genotype?

• Tt

• TT

• tT

• TtT