Punnett Squares

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 do the letters G and g represent in genetics?

Back

In genetics, uppercase letters (like G) typically represent dominant alleles, while lowercase letters (like g) represent recessive alleles.

Front

What is the genotype for a green plant if G = green and g = yellow?

Back

The genotype for a green plant can be either GG (homozygous dominant) or Gg (heterozygous).

Front

What is the genotype for a yellow plant if G = green and g = yellow?

Back

The genotype for a yellow plant is gg (homozygous recessive).

Front

What is the probability of obtaining a homozygous recessive offspring from a cross between two heterozygous parents (Gg x Gg)?

Back

The probability is 25%.

Front

What is the probability of heterozygous offspring from a cross between two heterozygous parents (Gg x Gg)?

Back

The probability is 50%.

Front

What kind of reproduction can be analyzed using a Punnett square?

Back

Punnett squares are used to analyze sexual reproduction.

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses (e.g., BB, Bb, or bb).

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., BB or gg).