AP Bio Hereditary Flashcards

The environment can alter the expression of genes

• Genes and Environment

• Fragile X Syndrome

• Genomic Imprinting

In fruit flies, the expression of the mutation for vestigial wings is altered by temperature

• Genes and the Environment

• Fragile X Syndrome

• Karyotype

In humans, the development of IQ is the result of an interaction of genetic predisposition and the child's surroundings.

• Genes and the Environment

• Barr Body

• Gene Mutations

One map unit= the distance within which recombination occurs 1% of the time.

• Map Units

• Chromosomal Mutations

• Nondisjunction

The greater number of map units between genes, the greater the chance they will be separated from each other by crossover.

• Gene Mutation

• Map Units

• Fragile X Syndrome

Based on the incidence of crossover, a linkage map can be constructed.

• Map Units

• Karyotype

• Nondisjunction

Family trees determine how a particular trait is inherited. Females are circles, males are squares.

• Pedigree

• Barr Body

• Results of Gene Mutations (C)

Your choices are always sex-linked dominant, sex-linked recessive, autosomal dominant, and autosomal recessive.

• Pedigree

• Conditions Caused by Gene Mutations (A)

• Barr Body

An inactivated X chromosome seen as a dark spot at the outer edge of the nucleus of all somatic cells in human females.

• Gene Mutations

• Barr Body

• Pedigree

Genes on that chromosome are generally not expressed

• Barr Body

• Gene Mutations

• Genes and the Environment