Question

Assortment 2 Review: Mitosis vs. Meiosis (send with students as HW) Meiosis Parent Cell (2n or n)? Does pairing of homologous chromosomes occur? What aligns at the equatorial plate? Which separates sister chromatids or homologous chromosomes? How many nuclear divisions? How many daughter cells? 2n or n? of

Answer 1

	Mitosis	Meiosis
Parent cell 2N or N	2n	2n
Does the pairing of homologous chromosomes occur	No	yes
What aligns at the equatorial plate	Chromosomes	Chromosomes
How many nuclear divisions	1	2
How many daughter cells	2 (2n)	4 (n)
Constancy or diversity	Constancy	Diversity

1. Mendel`s first law- It is called the law of segregation which states that "The two members of a gene pair (alleles) segregate (separate) from each other in the formation of gametes".

Mendel`s second law- It is called the law of independent assortment which states that" Genes for different traits assort independently of one another in the formation of gametes."

2. YY x yy

Yellow x green

	Y	y
y	Yy	Yy
y	Yy	Yy

all yellow with genotype Yy

3. Aa x AA

	A	a
A	AA	Aa
A	AA	Aa

genotypic ratio - AA : Aa - 1 : 1

phenotypic ratio - all dominant

4. AABB x AaBb

GAMETES- AB

AB,Ab, aB, ab

	AB	Ab	aB	ab
AB	AABB	AABb	AaBB	AaBb

genotypic ratio = AABB : AABb : AaBB : AaBb = 1:1:1:1

phenotypic ratio = all dominant