Biological Anthropology Exam 1 Study Guide- Matching

Question 1

Intron

Answer 1

DNA segments not involved in protein synthesis. In>info stays in the nucleus

Question 2

Gene flow

Answer 2

exchange of alleles between populations.
- tends to increase heterogeneity

Question 3

Intersexual selection

Answer 3

selection of trait of mate preference (female-to-male attraction)

Question 4

Intrasexual selection

Answer 4

selection of traits to enhance the ability to compete for mates (within male-to-male competition)

Question 5

Balancing selection

Answer 5

maintenance of multiple alleles or genotypes. (increases variation) (heterozygous advantage)

Question 6

Directional selection

Answer 6

increase or decrease of a specific allele. (decreases variation)`

Question 7

Mutation

Answer 7

is the only evolutionary mechanism that produces completely new alleles

Question 8

Exon

Answer 8

DNA segment involved in protein synthesis. ex>exit>leaves the nucleus

Question 9

Gene drift

Answer 9

changes to allele frequencies caused by random factors. ex; natural disasters, mating practices, etc.
- tends to decrease heterogeneity

Question 10

Genotype

Answer 10

combination of alleles at a locus
- homozygous dominant = RR
- heterozygous = Rr
- homozygous recessive = rr

Question 11

Phenotype

Answer 11

Observable characteristics or traits
-Hair Color
- Eye color
- Behavioral traits
-Rolling tongue

Question 12

Heterozygous

Answer 12

having two different versions of genes
-Aa
-Bb

Question 13

Homozygous

Answer 13

having two identical versions of genes
-AA
-aa