Punnett Squares/Heredity

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences. Example: blue eyes.

Front

What does homozygous recessive mean?

Back

Homozygous recessive refers to having two identical recessive alleles for a trait. Example: rr.

Front

Who is Gregor Mendel?

Back

Gregor Mendel is known as the father of genetics for his work on inheritance patterns in pea plants.

Front

Can two purebred black rabbits (BB) produce white offspring?

Back

No, it is not possible. Both parents have the dominant allele (B), so all offspring will be black.

Front

What is the probability of heterozygous offspring from Bb and bb parents?

Back

50%.

Front

What is a genotype?

Back

A genotype is the genetic constitution of an individual, represented by the alleles inherited from the parents.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in heterozygous conditions. Example: B (black fur) is dominant over b (white fur).

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.

Front

What does it mean if an organism is heterozygous?

Back

An organism is heterozygous if it has two different alleles for a particular gene. Example: Bb.

Front

What is the law of segregation?

Back

The law of segregation states that during the formation of gametes, the two alleles for a trait separate from each other.