Chapter 3

Question 1

The generations of a monohybrid cross and the expected ratios of each.

Answer 1

monohybrid = follows 1 character

P - parents are true breeders = homozygous for 1 of the traits

F1 offspring express only 1 of the P generation phenotypes (shows you which is dominant)

F2 offspring express both P generation phenotypes - 3:1 ratio

Question 2

Understand Mendel’s law of segregation and what it predicts

Answer 2

states that the 2 alleles at a locus separate, and they are passed with equal probability to each gamete

The 2 alleles separate when gametes form, and 1 allele goes into each gamete

diploid germ cell, goes thru meiosis I - 4 chromatids

Question 3

Understand Mendel’s Law of independent assortment and what it predicts

Answer 3

alleles at different loci separate independent of one another

Question 4

Be able to perform a dihybrid cross and know the expected genotypic and phenotypic ratios

Answer 4

phenotypic ratio - 9:3:3:1 (F2)