Terms From Chapter 6 Of Introduction To Genetic Analysis

Front 1

nulls

Back 1

Mutant alleles that produce either no protein product or one that exists but is nonfunctional.

Front 2

leaky mutations

Back 2

mutant alleles that produce proteins showing some low residual function.

Front 3

allelic series

Back 3

complete set of known alleles of one gene

Front 4

haplosufficient

Back 4

describes a gene that, in a diploid cell, can promote wild-type function in only one copy (dose)

Front 5

haploinsufficient

Back 5

describes a gene that, in a diploid cell, cannot promote wild-type function in only one copy (dose)

Front 6

full, or complete, dominance

Back 6

the homozygous dominant cannot be distinguished from the heterozygote

Front 7

incomplete dominance

Back 7

describes the general case in which the phenotype of a heterozygote is intermediate between those of the two homozygotes

Front 8

codominant

Back 8

the expression in a heterozygote of both the phenotypes normally shown by the two alleles

Front 9

Clover is common name for which genus? What is the V pattern on their leaves called?

Back 9

Trifolium, chevron

Front 10

lethal alleles

Back 10

mutant alleles that are capable of causing the death of an organism

Front 11

temperature sensitive (ts) mutations

Back 11

their phenotype is wild type at the PERMISSIVE TEMPERATURE (often room temperature), but mutant at the RESTRICTIVE TEMPERATURE.

Front 12

PAH cofactor

Back 12

tetrahydrobiopterin

Front 13

harebell plant genus

Back 13

Campanula

Front 14

double mutant

Back 14

genotype with mutant alleles of two different genes

Front 15

epistatic mutation

Back 15

mutation at one locus which overrides another in a double mutant

Front 16

hypostatic

Back 16

a mutation at one locus which is overridden by a mutation at another

Front 17

suppressor

Back 17

mutant allele at one gene that reverses the effect of a mutation of another gene, resulting in a wild-type or near wild-type phenotype (205)

Front 18

revertants

Back 18

wild type organisms that are merely reversals of the original mutational event (205)