Biology Meiosis

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Results are genetic clones

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Mitosis

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Asexual reproduction

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Mitosis

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Ending human cell has 46 chromosomes

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Mitosis

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Ends with diploid cells

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Mitosis

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Ending human cell has 23 chromosomes

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Meiosis

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Ends with haploid cells

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Meiosis

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Chromosome pairs

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Meiosis

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Chromosome tetrads

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Meiosis

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Has 4 phases

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Mitosis

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No recombinant dna

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Mitosis

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Produces 2 daughter cells

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Mitosis

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One cell division

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Mitosis

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Produces somatic cells

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Mitosis

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Begins with 2n cells

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Mitosis and meiosis

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Creates new cells

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Mitosis and meiosis

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Requires cytokinesis

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Mitosis and meiosis

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Starts with interphase

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Mitosis and meiosis

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DNA is replicated

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Mitosis and meiosis

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Has eight phases

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Meiosis

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Sexual reproduction

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Meiosis

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Recombinant dna created

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Meiosis

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Crossing over occurs

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Meiosis

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Two cell divisions

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Meiosis

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Produces germ cells

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Meiosis

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Produces gametes

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Meiosis

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Produces 4 daughter cells

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Meiosis

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Results are genetically different

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Meiosis

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P1 generation

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Parent generation

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F1 generation

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First generation of offspring

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F2 generation

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Second generation of offspring

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The offspring of parents with different traits

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Hybrids

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Disadvantages of sexual reproduction

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The parent must find a mate

Fewer offspring will be produced

It takes longer

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Advantage of sexual reproduction

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All of the offspring are genetically different from each other

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Sex cells egg and sperm

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Gametes

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The union of sperm and egg

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Fertilization

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A fertilized egg

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Zygote

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Body cells are

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Somatic cells

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When chromosomes or sister chromatids fail to separate during anaphase

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Nondisjunction

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Nondisjunction of the 21st pair of chromosomes causes Down syndrome

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Trisomy 21

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Trisomy in the sex chromosomes resulting in XXy

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Klinefelter syndrome

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The condition where a cell has either an extra chromosome or is missing one

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Aneuploidy

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Homologous chromosomes associated in pairs

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Bivalent

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Genotypes made of the same alleles

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Homozygous

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Different forms of genes for a single trait

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Alleles

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Gene that is always expressed

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Dominant

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Gene that is expressed only in the homozygous state

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Recessive

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Genotypes made of two different alleles

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Heterozygous

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The science that studies how genes are transmitted from one generation to the next

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Genetics

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The characteristic that in organism has, such as haircolor, eyecolor, tall or short, skin color

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Traits

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The genetic makeup of an organism always written in letters

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Genotype

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The physical characteristics of an organism what the organism looks like always with me in words

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Phenotype