Understanding Punnett Squares

What is a trait in genetics?

• A tool used in genetic engineering

• A specific type of gene

• A characteristic passed from one generation to another

• A type of genetic disorder

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What does a homozygous dominant genotype consist of?

• Two capital letters

• No letters

• Two different letters

• Two lowercase letters

How is a heterozygous genotype represented?

• Two capital letters

• One capital and one lowercase letter

• Two lowercase letters

• No letters

What is the first step in setting up a Punnett square?

• Filling in the boxes

• Calculating probabilities

• Drawing the square

• Writing the genotypes of the parents

In a cross of two long-whiskered seals, what is the probability of offspring with short whiskers?

• 100%

• 50%

• 25%

• 0%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What does the lowercase 'w' represent in the Punnett square example?

• Homozygous dominant

• None of the above

• Recessive short whiskers

• Dominant long whiskers

If one parent is heterozygous long whisker and the other is short whisker, what is the probability of short whiskers in the offspring?

• 100%

• 50%

• 25%

• 0%

Tags

NGSS.HS-LS3-3

Which genotype always represents the dominant trait?

• None of the above

• Homozygous recessive

• Heterozygous

• Homozygous dominant

What is the significance of capital letters in a genotype?

• They indicate a mutation

• They have no specific significance

• They indicate a dominant trait

• They indicate a recessive trait

How can you determine the dominant trait in a heterozygous genotype?

• It cannot be determined

• By the presence of one capital letter

• By the presence of two capital letters

• By the presence of two lowercase letters