Punnett squares review

What is a Punnett square used for?

• To determine the gender of an offspring.

• To study the inheritance of acquired traits.

• To analyze the genetic makeup of an individual.

• To predict the possible genotypes and phenotypes of offspring in a genetic cross.

What is a dihybrid cross?

• A breeding experiment between two individuals that differ in three traits.

• A breeding experiment between two individuals that have the same traits.

• A breeding experiment between two individuals that differ in two traits.

• A breeding experiment between two individuals that differ in one trait.

What is a monohybrid cross?

• A genetic cross between two individuals that are identical in all traits.

• A genetic cross between two individuals that differ in only one trait.

• A genetic cross between two individuals that differ in multiple traits.

• A genetic cross between two individuals that have no traits in common.

What is the difference between a recessive allele and a dominant allele?

• The location of the allele on the chromosome

• The number of copies of the allele in an individual

• The size of the allele

• The expression of the allele

What are alleles?

• Segments of DNA that code for proteins

• Alternative forms of a gene

• Different species of organisms

• Mutations in the genetic code

Tags

NGSS.HS-LS3-2

How many squares are in a Punnett square for a dihybrid cross?

• 8

• 12

• 16

• 4

In a monohybrid cross, what is the genotype ratio of the offspring when both parents are heterozygous?

• 1:2:1

• 1:1:1:1

• 2:1:1

• 3:1

In a Punnett square, what do the letters on the top and side represent?

• Alleles or genetic traits

• Phenotypes and genotypes

• Dominant and recessive traits

• Genes or chromosomes

What is the probability of getting a homozygous recessive offspring from a cross between two heterozygous parents?

• 10%

• 25%

• 75%

• 50%

Tags

NGSS.HS-LS3-3

What is the phenotype ratio of the offspring in a monohybrid cross between two heterozygous parents?

• 2:2

• 4:0

• 3:1

• 1:3