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AP Biology

Chapter 10 - Heredity, Book notes and questions

QuestionAnswer
Alleles separate before gametes are formed.
Alleles occupy corresponding loci on homologous chromosomes.
A monohybrid cross involves individuals with different alleles of a given locus.
What does a Punnett square predict? Ratios of the various offspring of a cross.
The phenotype of an individual does not always reveal its genotype.
What can a test cross detect? Heterozygosity
A dihybrid cross involves individuals that have different alleles at two loci.
Alleles on nonhomologous chromosomes are randomly distributed into gametes.
When are the rules of probability useful? In predicting Mendelian inheritance.
The rules of probability can be applied to a variety of calculations.
Linked genes do not assort indepenently.
Calculating the frequency of crossing-over reveals the linear order of linked genes on a chromosome.
What is sex determined by? Sex chromosomes
What does the Y chromosome determine? Male sex in most species of mammals
X-linked genes have unusual inheritance patterns.
Dosage compensation equalizes the expression of X-linked genes in males and females.
Dominance is not always complete.
Multiple alleles for a locus may exist in a population.
A single gene may affect multiple aspects of the phenotype.
Alleles of different loci may interact to produce a phenotype.
Polygenes act additively to produce a phenotype.
Why do genes interact with the environment? To shape phenotype
Created by: crescenti
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