chapter 7 unit 2 test one

Question 1

define allele

Answer 1

alternative forms of a age (tall or short)

Question 2

genotype

Answer 2

the letters assigned to each allele. Each genotype has two letters (one allele on each homologous pair)

Question 3

phenotype

Answer 3

the observable from of said trait

Question 4

dominant trait

Answer 4

if the dominant (uppercase) trait is present, then that trait is ALWAYS expressed. Can be heterozygous or homozygous

Question 5

recessive trait

Answer 5

two copies of the recessive (lowercase) gene need to be present in the genotype for the trait to express
Always hemozygous

Question 6

codominance

Answer 6

both traits express in different patterns or locations on the organism
red+white flower = red+white flower

Question 7

incomplete dominance

Answer 7

a blend of two traits is expressed
e.g. incomplete dominance red flower+blue flower=purple flower

Question 8

what is a eukaryote

Answer 8

a cell or organism that has a clearly defined nucleus

Question 9

heterozygous meaning

Answer 9

having two different alleles

Question 10

homozygous meaning

Answer 10

having two identical alleles

Question 11

recessive allele

Answer 11

the allele that is only present if two copies
will be masked by dominant