Monohybrid Crosses

Front

What is a monohybrid cross?

Back

A monohybrid cross is a genetic mix between two individuals with different alleles for a single trait, focusing on one characteristic.

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What does heterozygous mean?

Back

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

Front

What does homozygous mean?

Back

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

Front

What is a dominant allele?

Back

A dominant allele is an allele that expresses its trait even when only one copy is present, masking the effect of a recessive allele.

Front

What is a recessive allele?

Back

A recessive allele is an allele that only expresses its trait when two copies are present, and is masked by a dominant allele.

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the genetic outcomes of a cross between two individuals.

Front

What is the expected phenotypic ratio of a monohybrid cross between two heterozygous parents?

Back

The expected phenotypic ratio is 3:1, where 3 offspring show the dominant trait and 1 shows the recessive trait.

Front

What is the expected genotypic ratio of a monohybrid cross between two heterozygous parents?

Back

The expected genotypic ratio is 1:2:1, representing one homozygous dominant, two heterozygous, and one homozygous recessive.

Front

If a brown-eyed (Bb) and a blue-eyed (bb) parent have children, what is the probability of having a blue-eyed child?

Back

There is a 50% chance of having a blue-eyed child.

Front

What is the significance of the letter 'A' in genetic notation?

Back

The letter 'A' typically represents a dominant allele in genetic notation.