genetics terms

Question 1

both alleles contribute to phenotype

Answer 1

codominance

Question 2

phenotype varies among individuals with same genotype

Answer 2

variable expressivity

Question 3

not all individuals with a mutant genotype show the mutant phenotype

Answer 3

incomplete penetrance

Question 4

one gene contributes to multiple phenotypic effects

Answer 4

pleiotropy

Question 5

incr severity ot earlier onset of disease in succeeeding generations

Answer 5

anticipation

Question 6

a heterozygote produces a nonfunctional altered protein that also prevents the normal gene product from functioning

Answer 6

dominant negative mutation

Question 7

tendency for certain alleles at 2 linked loci to occur together more often than expected by chance

Answer 7

linkage disequilibrium

Question 8

presence of genetically distinct cell lines in the same indiv

Answer 8

mosaicism

Question 9

mutations at different loci can produce a similar phenotype

Answer 9

locus heterogeneity

Question 10

different mutations in the same locus produce the same phenotype

Answer 10

allelic heterogeneity

Question 11

presence of both normal and mutated mtDNA, resulting in variable expression in mitochondrial inherited disease

Answer 11

heteroplasmy