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Genetics, Aging and Reproduction

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Across
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embryo formed by meiosis
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new individual is an outgrowth of parent
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A progressive genetic disorder that causes children to age rapidly
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Type of hermaphrodite Examples: wrasse fish and clown fish
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Type of dominance in which genes blend expression
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one organism produces genetically identical copies (clones)
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both dominant and recessive genes express themselves
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1 gene can affect more than one trait
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Example:blood types, expression of trait using 3 or more genes
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Specific characteristic that varies from one individual to another
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Failure of chromatids to properly separate during meiosis
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Type of inheritance in which several pairs of genes all affect the same trait (color of skin, hair, eyes)
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Cell division creating gametes
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Process begun 2/3 through puberty
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Reproduction generally involves two parents that produce haploid gametes (Meiosis)
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Genetic coding for dominant or recessive traits
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specialized cells clump together, surrounded by spicules (skeletal structures) and tough spongin coat
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identifies and locates where specific genes are located on various chromosome
Down
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Body cavity in the mesoderm
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Chemical factors that determine a trait
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Take electrons from other molecules, neutralized by antioxidants
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Reproduction by mitosis (cloning)
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pieces of adult break off, regenerate into new adults
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Bisexual reproduction with separate sexes
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Ends of chromosomes
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one organism with both sets of reproductive organs
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Development of an embryo from an UN-fertilized egg
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Genes are separated from each other during gamete formation in meiosis
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a third layer of cells (in the middle)
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after fertilization, zygote divides repeatedly (mitosis) until a hollow ball of 100’s of cells is formed
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Syndrome caused by 3 copies of the 21st chromosome (trisomy)
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Different forms of a gene