Chapter 11 - The Basic Principles of Heredity

Question 1

Principle of Segregation

Answer 1

Alleles separate before gametes are formed

Question 2

locus

Answer 2

segment of the DNA that has the information for controlling some aspect of the structure or function of the organism

Question 3

A monohybrid cross involves individuals with _______ alleles of a given locus

Answer 3

different

Question 4

A test cross can detect

Answer 4

heterozygosity

Question 5

dihybrid cross involves individuals that have different alleles at ___ loci

Answer 5

two

Question 6

principle of independent assortment

Answer 6

alleles on nonhomologous chromosomes are randomly distributed into gametes

Question 7

crossing-over

Answer 7

a process in which genetic material (DNA) is exchanged between paired, homologous chromosomes

Question 8

barr body

Answer 8

dense metabolially inactive X chromosome

Question 9

pleiotropy

Answer 9

the ability of a single gene to have multiple effects

Question 10

epistasis

Answer 10

common type of gene interaction in which the presence of certain alleles of one locus can prevent or mask the expression of alleles of a different locus and express teir own phenotype instead