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Why does meosis take place?
Meosis is the cell division process that enables the transformation from 2n to n
How does Meosis take place?
parent cell -> DNA Replicates -> Two daughter cells
-> Four daughter cells
Why is meosis more complicated that mitosis?
-Gametes must contain precisely half the diploid number of chromosomes
-They must contain one of each homologus pair of chromosomes
What are the stages of Mitosis?
-> Telophase-> Cytokinesis
What were Mendel's Experiments?
-Pea Plants; studied seven traits that bred true
What is the Law of Segregation?
During gametogenesis (meiosis), the paired factors segregate randomly so that half of the gametes received one factor and half of the gametes received the other
What is the Law of Independent Assortment?
During gamete formation, the segregation of any pair of hereditary determinants is independent of the segregation of other pairs
What is the Theory of Segregation?
-An individual inherit a unit of information (allele) about a trait from each parent
-During gamete formation, the alleles segregate from each other
What is a test cross?
individual that shows dominant (heterozygous or homozygous dominant) phenotype is crossed with individual with recessive phenotype
Why did Mendell use the pea plant?
-True breeding (different alleles not normally introduced)
-Can be experimentally cross-pollinated
What takes place during Gene Expression?
-Genes (DNA) are transcribed into RNA
-mRNA is translated into protein, tRnA & rRNA work in translation process
The theory that humans can influence our own evolution, through selective breeding or genetic enhancement
What does genetics mean?
the study of heredity and the variation of inherited characteristics (ex: domestication of plants & animals)
Why do all chromosomes in your body cells come in pairs?
Because we have two biological parents. One chromosome comes from mom; One chromosome comes from dad
How many different kinds of chromosomes will you find in your body cells?
Two; autosomes and sex chromosomes
Why is half the number of chromosomes in your body cells found in your gametes?
so that they create a normal (diploid) cell with 46 chromosomes
Why do homologous pairs of chromosomes split apart during meiosis?
so that each daughter cell only has 23 chromosomes; Anaphase Stage
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