Chapter 5 Terms

Question 1

formation of new genetic combinations by exchange of parts between homologs

Answer 1

recombination

Question 2

when alleles of two loci recombine in less than 50% of gametes

Answer 2

linkage

Question 3

a statistical method for testing the fit between observed and expected results

Answer 3

chi-square test

Question 4

structure formed at the spot where crossing-over occurs between homologs

Answer 4

chiasma

Question 5

an ascus containing spores of four different genotypes

Answer 5

tetratype

Question 6

the relative chromosomal location of a gene

Answer 6

locus

Question 7

the ratio of observed double crossovers to expected double crossovers

Answer 7

coefficient of coincidence

Question 8

one crossover along a chromosome makes a second nearby cross over less likely

Answer 8

interference

Question 9

an ascus containing only two recombinant kinds of spores

Answer 9

parental ditype

Question 10

ascospores

Answer 10

fungal spores contained in a sac

Question 11

when the two alleles of a gene are segregated into different cells at the first meiotic division

Answer 11

first division segregation

Question 12

individual composed of cells with different genotypes

Answer 12

mosaic