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6 Cards in this Set
- Front
- Back
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sexual reproduction
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- involves:
- fertilization - meiosis |
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Organisms have a characteristic number of chromosomes:
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- fruit fly have 8 chromosomes
- humans have 46 chromosomes - goldfish have 94 chromosomes |
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2 general cell types within an organism:
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1) somatic cells- make up all the body's tissues
2) Germ cells- represent a cell lineage set aside for sexual reproduction; found in reproductive organs |
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Sexual Reproduction
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- begins with meiosis and proceeds through the formation of gametes (sperm & eggs)
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Haploid (n)
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- number of chromosomes found in gametes (half that found in somatic cells)
- ex: humans n=23 (human karyotype) |
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Diploid (2n)
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- number of chromosomes found in somatic cells
ex: humans 2n=46 - in diploid cells chromosomes occur in pairs (homologous pairs) - each individual of a homologous pair is called a homologue |
