Punnett Squares & Heredity

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

Front

What does homozygous dominant mean?

Back

Homozygous dominant refers to having two identical dominant alleles for a trait, such as 'AA'.

Front

What is the genotype for a short plant if tall (T) is dominant?

Back

The genotype for a short plant is 'tt'.

Front

What is the probability of producing a tall plant from a Tt x Tt cross?

Back

The probability of producing a tall plant is 75%.

Front

What does the term 'allele' mean?

Back

An allele is a variant form of a gene that determines a specific trait.

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed when at least one dominant allele is present, while recessive traits are only expressed when two recessive alleles are present.

Front

How do you represent a dominant allele?

Back

A dominant allele is typically represented by a capital letter, such as 'T' for tall.

Front

How do you represent a recessive allele?

Back

A recessive allele is typically represented by a lowercase letter, such as 't' for short.

Front

What is the probability of a child having blue eyes if both parents are heterozygous (Bb)?

Back

The probability is 25%.

Front

What does it mean if an organism is heterozygous?

Back

An organism is heterozygous if it has two different alleles for a trait, such as 'Bb'.