Inheritance Key Terms

Question 1

genotype

Answer 1

genetic constitution of an organism

Question 2

phenotype

Answer 2

expressions of a gene and its interaction with the environment

Question 3

homozygous

Answer 3

pair of homologous chromes carrying same allele for a single gene

Question 4

heterozygous

Answer 4

pair of homologous chromosomes carrying 2 different alleles for a single gene

Question 5

recessive allele

Answer 5

allele only expresses if no dominant allele is present

Question 6

dominate allele

Answer 6

allele that will always be expressed in the phenotype

Question 7

codominant

Answer 7

both alleles are expressed in the heterozygote resulting in a different phenotype

Question 8

multiple alleles

Answer 8

more than 2 alleles for a single gene

Question 9

sex-linkage

Answer 9

gene whose locus is on the X or Y chromosome

Question 10

autosomal linkage

Answer 10

genes that are located on the same chromosome (not sex chromosome)

Question 11

epistasis

Answer 11

when one gene modifies or masks the expression of a different gene at a different locus

Question 12

monohybrid

Answer 12

genetic inheritance cross of a characteristic determines by 1 gene

Question 13

dihybrid

Answer 13

genetic inheritance cross for a characteristic determined by 2 genes

Question 14

gene pool

Answer 14

all the alleles of all the genes within a population at one time

Question 15

population

Answer 15

all the individuals of one species in one area at one time

Question 16

allele frequency

Answer 16

the proportion of an allele within the gene pool