Module 8

Question 1

gene

Answer 1

segment of DNA that codes for a protein

Question 2

dominant

Answer 2

the trait or gene that is expressed

Question 3

recessive

Answer 3

the gene or trait that is hidden

Question 4

allele

Answer 4

a version or variation of a gene

Question 5

homozygous

Answer 5

an identical pair of alleles

Question 6

heterozygous

Answer 6

two different alleles

Question 7

genotype

Answer 7

the genetic make-up pair alleles, the combination of alleles

Question 8

phenotype

Answer 8

the actual physical expression of the gene

Question 9

Law of segregation

Answer 9

pairs of alleles segregate equally into gametes during Meiosis l

Question 10

Law of independent assortment

Answer 10

alleles of two (or more) different genes assort independently in gamete formation

Question 11

Autosomal

Answer 11

genes that are located on autosomes

Question 12

autosomal recessive inheritance

Answer 12

two copies of the recessive allele are required

Question 13

autosomal dominant inheritance

Answer 13

only one dominant allele necessary to cause a phenotype

Question 14

Incomplete dominance

Answer 14

characterized by an intermediate phenotype (red flower + white flower = pink flower)

Question 15

Codominance

Answer 15

both alleles are expressed in heterozygous individuals (AB blood type, striped white and red flower)

Question 16

polygenic trait

Answer 16

multiple genes influence the trait

Question 17

Sex-linked

Answer 17

X-linked inheritance - determined by genes on the X chromosome