Test I Module II

Question 2

All lines of the pea plants were ______ breeding

Answer 2

true (pure)

Question 3

plants in true-breeding line always produce offspring with the _____

Answer 3

same trait as the parents.

Question 4

Monohybrid crosses

Answer 4

analyzing only 1 trait.
Crosses between two organisms that are different pure breeding variants of the same trait.

Question 5

Mendels law of segregation

Answer 5

each trait has 2 gene copies (referred to as unit factors)
the 2 gene copies segregate equally during gamete formation
- half gametes get 1 copy, and the other half get the other.

Question 6

genotype

Answer 6

the genetic makeup of an individual

Question 7

homozygous

Answer 7

2 identical alleles

Question 8

hetero

Answer 8

2 different alleles

Question 9

Wild type/ normal allele

Answer 9

the allele that occurs most frequently

Question 10

mutant/ affected alleles

Answer 10

do not occur most frequently

Question 11

Phenotype

Answer 11

observable characteristics (tall/short)

Question 12

a ____ determines the likely genotype of an organism with a dominant phenotype

Answer 12

test cross

Question 13

a _____ is a cross between male and female that are identically heterozygous for 2 different traits

Answer 13

dihybrid cross

Question 14

what is mendel’s law of independent assortment?

Answer 14

alleles on different chromosmes assort independently

Question 15

a dihybrid cross produces
???

Answer 15

9 different genotypes,
2 different phenotypes in 9:3:3:1 ratio.