Non-Mendelian Genetics

Front

What is Non-Mendelian Genetics?

Back

Non-Mendelian Genetics refers to patterns of inheritance that do not follow Mendel's laws of inheritance, including incomplete dominance, codominance, and sex-linked traits.

Front

Define incomplete dominance.

Back

Incomplete dominance is a genetic situation in which one allele does not completely dominate another allele, resulting in a phenotype that is a blending of the two traits.

Front

What is codominance?

Back

Codominance is a form of inheritance where both alleles in a heterozygote are fully expressed, resulting in a phenotype that shows both traits distinctly.

Front

What is a sex-linked trait?

Back

A sex-linked trait is a trait associated with a gene that is carried only by the male or female parent, often located on the X or Y chromosome.

Front

What genotype represents a female carrier for hemophilia?

Back

X^H X^h

Front

What genotype represents a female fly with white eyes in fruit flies?

Back

X^r X^r

Front

What is the expected phenotype ratio in offspring from a cross showing incomplete dominance?

Back

The expected phenotype ratio is typically 1:2:1 for a monohybrid cross.

Front

What percentage of offspring will have red flowers when crossing RR and WW plants with incomplete dominance?

Back

0%.

Front

What percentage of offspring will have blue flowers when crossing PP and WW plants with incomplete dominance?

Back

100%.

Front

What is the significance of the X chromosome in sex-linked traits?

Back

The X chromosome carries many genes that determine traits, and because males have only one X chromosome, they are more likely to express recessive traits linked to it.