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Bio Test 3
All about cells!
71
Biology
Undergraduate 1
03/07/2015

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Term
What are the two types of cells?
Definition
-Somatic (body) cells
-Sex cells or Gamettes (Eggs & Sperms)
Term
Homologous Chromosomes
Definition
Chromosomes that occur in pairs of somatic cells
Term
Do sex cell chromosomes occur in pairs?
Definition
No
Term
What is a sex cell chromosomes number in sex cells?
Definition
Haploid
Term
In human females what is the haploid (n)?
Definition
23
Term
What is the diploid (2n) number in females?
Definition
46
Term
Do chromosomes occur is pairs in humans?
Definition
Yes
Term
In humans can chromosomes only come from one parent?
Definition
No, they must come from different parents.
Term
What does mitosis do?
Definition
Produces all somatic cells, except for the original (the zygote)
Term
What happens during Meiosis of a somatic cell?
Definition
All the sex cells of an individual are produced; the fertilized egg or zygote is produced the result.
Term
What are the five phases of a cell cycle?
Definition
-Prophase
-Metaphase
-Anaphase
-Telephase
-Interphase
Term
Which type of cell division occurs in the nucleus?
Definition
karyokinesis
Term
Which type of cell division occurs in the cytoplasm?
Definition
cytokinesis
Term
How long is interphase?
Definition
20 hours
Term
Which phase of the cell cycle is the longest?
Definition
Interphase
Term
How long does mitosis last?
Definition
2 hours
Term
In which phase of a somatic cell does chromatin double?
Definition
Interphase
Term
In which phase of a somatic cell do centiroles moves to opposite ends of the cell?
Definition
Prophase
Term
In what phase of a somatic cell do chromosomes attached to spindle fibers line up along the equatorial plane of a cell?
Definition
Metaphase
Term
In which phase of a somatic cell do chromatids separate and move along a spindle fiber toward opposite poles of the cell?
Definition
Anaphase
Term
What phase does cytokenesis begin in somatic cells?
Definition
Anaphase
Term
In what phases do chromosomes elongate into chromatin threads in somatic cells?
Definition
Telephase
Term
What are some things that animal cells have that plant cells do not?
Definition
Centrioles, spindle fibers, and cleavage furrows
Term
What is something that a plant cell has that animal cells do not?
Definition
A cell plate
Term
What phase do nuclear membranes form in somatic cells?
Definition
Telephase
Term
Does karyokinesis occur in the cytoplasm or the nucleus?
Definition
The nucleus
Term
What is another name for sex cells?
Definition
Gametes
Term
What is the division of the nucleus (karyokinesis) called?
Definition
Meiosis
Term
In sex cell production does mitosis or meiosis occur?
Definition
meiosis
Term
What does karyokinesis produce?
Definition
Gametes
Term
In the production of sex cells, how many duplications of chromatin are there?
Definition
Just one
Term
How many divisions in cytoplasm in Gametogenesis
Definition
Two divisions
Term
In what way is Meiosis I different from Mitosis?
Definition
In prophase, synapsis of homologus chromosomes form a tetrad.
Term
What is a tetrad?
Definition
A group of four chromatids
Term
In Mitosis how many spindle fibers are there?
Definition
46
Term
In Mitosis what is the number of chromatids?
Definition
2
Term
In Meiosis how many spindle fibers?
Definition
23
Term
In Meiosis how many chromatids?
Definition
4
Term
What happens in Metaphase of Gametogenesis?
Definition
Chromatids of homoglobus chromosomes separate, each attaching to its own chromatid
Term
In which phase of Gametogensis does the formation of two new nuclei occur?
Definition
Telephase
Term
What occurs in the Interphase of sex cells?
Definition
2 haploid cells are formed instead of 2 diploid cells
Term
Are Meiosis II and Mitosis the same?
Definition
Yes, EXCEPT THERE IS NO DUPLICATION OF CHROMATIN
Term
Gametogenesis in males
Definition
Spermatogenesis (4 sperms)
Term
Gametogenesis in females
Definition
OOgenesis (1 ovum & 3 polar bodies)
Term
What is the adaptive significance of sexual reproduction?
Definition
Genetic variation in offspring
Term
What are gametes not identical to their parents?
Definition
Because of Meiosis I
Term
What produces recombination of genes?
Definition
Crossing over
Term
Who was Gregor Mendel?
Definition
The "Father of Genetics"
Term
What is the concept of Mendelian Genetics?
Definition
One gene controls one trait
Term
What's a phenotype?
Definition
The chemical/physical expression of a trait
Term
What's a genotype?
Definition
The condition of the genes
Term
What are the alleles for blood type?
Definition
A, B, O
Term
Principle segregation
Definition
Alleles are separated at mitosis & rejoined @ fertilization
Term
Heterozygos
Definition
Different yolks
Term
Homozygos
Definition
Same yolks
Term
Monohybrid Cross
Definition
The inheritence of two different alleles of a single locus
Term
Di-hybrid Cross
Definition
A mating b/t individuals w/different alleles @ 2 loci
Term
Incomplete Dominance
Definition
When a heterozygos individual has a phenotype intermediate b/t those of its two parents
Term
Codominance
Definition
Multiple alleles
Term
In ABO Blood Typing what are the 2 anitigens?
Definition
A & B
Term
In ABO Blood Typing what are the 3 alleles?
Definition
A, B, O
Term
How many genotypes of blood are there nigga?
Definition
6
Term
What are the 4 phenotypes of blood?
Definition
A, B, AB, O
Term
Universal Donor
Definition
O
Term
Universal Recipient
Definition
AB
Term
Karotype
Definition
Display of an individual's chromosomes
Term
Trisomy
Definition
3 chromosomes instead of 2
Term
Examples of Trisomy
Definition
-Edwards Syndrome
-Pataus Syndrome
-Down Syndrome
-Klinefelter Syndrome
Term
Monosomy
Definition
Turner syndrome
Term
Translocation
Definition
Cridu chat: Crying Cat
Term
Consanguineous matings
Definition
Doing it with your family
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