Mendelian & Non-Mendelian Genetics

Front

What is codominance in genetics?

Back

Codominance is a type of inheritance where both alleles in a heterozygote are fully expressed, resulting in a phenotype that is neither dominant nor recessive. Example: AB blood type.

Front

What does it mean for a woman to be a carrier of a genetic disorder?

Back

A carrier is a person who has one copy of a recessive allele for a genetic disorder but does not exhibit symptoms of the disorder. She can pass the allele to her offspring.

Front

What are genotypes?

Back

Genotypes are the genetic makeup of an organism, represented by the combination of alleles (e.g., Aa, DD, bB, yy).

Front

What genotype represents a male with hemophilia?

Back

X^hY represents a male with hemophilia, where X^h is the X chromosome carrying the hemophilia allele.

Front

What is incomplete dominance?

Back

Incomplete dominance is a type of inheritance where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes. Example: Red and white flowers producing pink flowers.

Front

What is the difference between phenotype and genotype?

Back

Phenotype is the observable physical or biochemical characteristics of an organism, while genotype is the genetic constitution that determines these traits.

Front

What is polygenic inheritance?

Back

Polygenic inheritance is a type of inheritance where multiple genes influence a trait, resulting in a continuous range of phenotypes. Example: human height.

Front

What is a recessive allele?

Back

A recessive allele is an allele that only expresses its trait when two copies are present (homozygous). It is masked by the presence of a dominant allele.

Front

What is a dominant allele?

Back

A dominant allele is an allele that expresses its trait even when only one copy is present (heterozygous). It masks the effect of a recessive allele.

Front

What is an example of a sex-linked trait?

Back

Hemophilia is an example of a sex-linked trait, specifically an X-linked recessive disorder.