genetics, 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 mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as BB or bb.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene, such as Bb.

Front

What is a genotype?

Back

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

Front

What is a phenotype?

Back

A phenotype is the physical expression or characteristics of a genotype, such as fur color or height.

Front

What is the probability of an offspring showing a recessive trait if both parents are heterozygous?

Back

25%.

Front

What is the probability of an offspring showing a dominant trait if one parent is homozygous dominant and the other is homozygous recessive?

Back

100%.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in a heterozygous genotype.

Front

If B = brown fur and b = white fur, what is the probability of getting brown fur from a Bb x Bb cross?

Back

75%.

Front

What does it mean if an organism is a carrier for a trait?

Back

A carrier is an individual who has one dominant and one recessive allele for a trait but does not express the recessive trait.