Section 12

Question 1

An individual heterozygous for a specific trait

Answer 1

Carrier

Question 2

A developing mammal from nine weeks to birth

Answer 2

Fetus

Question 3

Inheritance pattern where the phenotype of a heterozygote is intermediate between those of the two homozygotes; neither allele of the pair is dominant but combine and display a new trait

Answer 3

Incomplete dominance

Question 4

Pattern where phenotypes of both homozygote parents are produced in heterozygous offspring so that both alleles are equally expressed

Answer 4

Codominant allele

Question 5

Presence of more than two alleles for a genetic trait

Answer 5

Multiple allele

Question 6

Pairs of matching homologous chromosomes in somatic cells

Answer 6

Autosome

Question 7

In humans, the 23rd pair of chromosomes; determine the sex of an individual and carry sex linked characteristics

Answer 7

Sex chromosome

Question 8

Traits controlled by genes located on sex chromosomes

Answer 8

Sex-linked traits

Question 9

Inheritance pattern of a trait controlled by two or more genes; genes may be on the same or different chromosomes

Answer 9

Polygenic inheritance

Question 10

Chart of metaphase chromosome pairs arranged according to length and location of the centromere; used to pinpoint unusual chromosome numbers in cells

Answer 10

Karyotype

Question 11

Graphic representation of genetic inheritance used by geneticists to map genetic traits

Answer 11

Pedigree