Complex Inheritance

Front

What is complex inheritance?

Back

Complex inheritance refers to patterns of inheritance that do not follow simple Mendelian genetics, including incomplete dominance, codominance, and multiple alleles.

Front

What is the genotype for a colorblind female?

Back

Xc Xc (homozygous recessive) or Xc XC (heterozygous) if she inherits one normal X chromosome.

Front

What is the genotype for a colorblind male?

Back

Xc Y (hemizygous for colorblindness, as males have only one X chromosome).

Front

What is the principle of dominance?

Back

In a heterozygous genotype, the dominant allele masks the effect of the recessive allele.

Front

What is incomplete dominance?

Back

A form of inheritance where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes.

Front

What is codominance?

Back

A form of inheritance where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that is neither dominant nor recessive.

Front

What is a Punnett square?

Back

A diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

Front

What fraction of offspring will be tall from a cross of two heterozygous tall pea plants (Tt x Tt)?

Back

3/4 of the offspring will be tall.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup of an organism, while phenotype refers to the observable traits or characteristics.

Front

What is a recessive allele?

Back

An allele that is masked by the presence of a dominant allele and only expressed in a homozygous condition.