Flashcards in Chapter Two Deck (72):
What four things occurs in prophase?
1. Chromosomes become chromatin
2. Nuclear membrane distinguishes
3. Centrioles double and move
4. Development of spindle
What happens in metaphase
Chromosomes line up in the equator of the cell.
What happens in anaphase?
Tear centromeres apart, to Opposite poles.
What happens in telophase?
It is the reverse of prophase
1spindle breaks down
2 nuclomembrane reforms
3. Chromosomes go back to chromatin
What is the characteristics of sexual reproduction?
Sex is for variations.
A COMBO of mom and dad
Sperm and egg
What is the phases in mitosis?
Interphase( g1 s g2)
Where is the only place meiosis occurs?
What is the first place variation comes from crossing over?
What is the second place variation comes from crossing over?
What is the purpose for meiosis one?
Produce haploid cells
What happens in prophase one.
Each pair of chromosomes pair up and lay next to each other about to cross over but only piece ps of each end get swapped back and forth.
What happens in metaphase one?
Start to line up in the middle still shuffling chromosomes.
Shuffles chromosomes and DNA.
What is the third place of variations?
You choose the partners.
What happens in meiosis one
It splits pairs
Two chromosomes but doubles DNA
What happens in meiosis two?
Line up tear apart and move apart with haploid
But with normal DNA
What was the first theory of genetics?
What did the first theory of genetics mean?
Believed humans were pre formed
Little humans in sperm.
What was the second theory of genetics?
What does the second theory of genetics mean?
Cross two things becomes characteristics in between.
Tall + short = medium
But if this would keep happening there would be no variations.
What is the third theory of genetics?
What was Mendels first law of genetics?
What does segregation mean?
All organisms have two factors for each trait that separate during meiosis and come back together as fertilization.
What is genotypic ratio?
tt TT Tt
25% 50% 25%
What is phenotypic ratio?
Tall or short
What was medels second law?
What is independent assortment?
Alleles for one trait don't effect the sorting of allels for another trait during meiosis.
What is an Incomplete cross?
What is an example of Codominance cross?
What chromosomes are sex chromosomes?
The last two chromosomes
What letters determine males?
What letters determine Female.
What's the difference between meiosis one and meiosis two?
Meiosis one separates pairs
Meiosis two separates arms
What are chromosomes?
What are chromatin?
What are chromatid?
Different size of chromosomes
Half of a double
What is cry of the cat?
Short number five chromosome
What happens in G1?
What happens in G2 phase?
Make protein material to divide.
What happens in nondisjunction?
Pair of chromosomes don't separate in meiosis one.
What are bar bodies?
The second X falls off.
Cross BBSS X BbSs
What is the genotype for Red?
What is the genotypic for pink?
What is the genotype for white?
What does homozygous mean?
two big letters
What does heterozygous mean?
One big letter one little letter
What is blood type A Dominant over?
What is blood type B Dominant over?
What Is AB.
What are other forms of blood type A
What are other forms of blood type B?
What are other forms of AB
There are none it's just AB
What are other forms of O
What is an example of a sex linked trait?
Is males or females more susceptible to color blindness?
Can people be color blind and carrier?
No has to be one or the other
What is mutation?
Any change in DNA
What are the levels of mutation?
What is substitution?
CAT CAT CAT
CGT CAT CAT
tiny change causes sickle cell disease.
What is deletion?
CAT ATC ATC
causes frame shift and changes every
What are some symptoms of cry of the cat?
Bite fingers off
What happens when whole chromosomes are missing?
What happens when there is a third extra 21 chromosomes?
What is non disjunction?
When both XX's travel together making the genotype XXXX
What is the genotype in women for klinefelters?
XXY femalish male
What is the genotype in women for turners
What happens when the chromosomes in women are XO
It's a spontaneous abortions
What is the genotype for the sperm when having klinefelters?
What is the genotype for the sperm when having turners?
What is the genotype for the sperm when having super woman?
What is the genotype for the sperm when having Jacobs syndrome?