Chromosomes
If a somatic cell has 2n = 8 chromosomes. What will the n count be in the gamete?
n = 4
How many nuclear divisions happen in meiosis?
2
What are the two steps of meiosis? and which is closer to mitosis?
I and II, II is closer to mitosis
Two alleles (Aa) separate individually and equally to gametes (A) and (a)
law of segregation
Cellular metabolism gets you how much ATP
32
The chance that an offspring will be male or female is....
50%
The purpose of meiosis is two-fold. what are the two reasons
When there are too many or too few chromosomes missing or present this is called
aneuploidy
Absolute linkage is when what happens
two alleles always go to same chromosome
The invagination of small molecules or liquids is called
pinocytosis
How many pairs of homologous chromosomes does a human have?
23 pairs
Pairing is called _____, while ______ leads to genetic diversity
synapsis, crossingover
The number of chromosomes in a cell of a grasshopper that has gone through meiosis is 18. How many homologous pairs of chromosomes are in somatic cell of the grasshopper?
18
When alleles of different genes assort independently this is called
law of independent assortment
What is the largest sea animal?
blue whale
What stage in the cell cycle is the DNA 2X normal amount?
S
After Metaphase I, what separate?
the homologous pairs
What is it called when homologous pairs fail to separate?
nondisjunction
What is the common ratio of a dihybrid cross?
9:3:3:1
How many presidents have been assassinated?
4
What common garden vegetable has more DNA than humans?
After metaphase II, what separate?
sister chromatids
What is the survival rate of gametes in males? and females?
100% (4/4), 25% (1/4)
What is the maximal recombinant frequency?
.5
Name one of these aside from Lincoln and JFK
Garfield and McKinley