Mendel's Principles of Genetics



|Mendel's Principles of Genetics |Meiosis |

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|There are ____________ forms of genes which account for | |

|variations in inherited traits. | |

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|2. For each inherited trait an individual has _________ factors| |

|(genes) one from each parent. | |

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|3. The principle of segregation: The two members of a gene |[pic] |

|___________ pair (alleles) segregate (______________) from each | |

|other in the formation of gametes. Half the gametes carry one | |

|allele, and the other half carry the other allele. | |

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|This happens in ______________ | |

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|The principle of independent assortment: Genes for different |Alternative arrangement 1 |Alternative arrangement 2 |

|traits (not on the same chromosome) assort ____________________ | | |

|of one another in the formation of gametes. | | |

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| | | |

|The number of possible chromosome combinations is potentially | | |

|very large. In general, the number of possible chromosome | | |

|combinations is 2n, where n is the number of chromosome pairs. | | |

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|For humans 2n is 223 or ____________ possible combinations. | | |

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Answer Key

|Mendel's Principles of Genetics |Meiosis |

|There are alternate forms of genes which account for variations |[pic] |

|in inherited traits. | |

| | |

| | |

| | |

|2. For each inherited trait an individual has two factors |[pic] |

|(genes) one from each parent. | |

|3. The principle of segregation: The two members of a gene pair | |

|(alleles) segregate (separate) from each other in the formation | |

|of gametes. Half the gametes carry one allele, and the other half| |

|carry the other allele. | |

| | |

|This happens in Meiosis 1 | |

|The principle of independent assortment: Genes for different |Alternative arrangement 1 |Alternative arrangement 2 |

|traits (not on the same chromosome) assort independently of one | | |

|another in the formation of gametes. | | |

| | | |

|The number of possible chromosome combinations in the haploid | | |

|nuclei is potentially very large. In general, the number of | | |

|possible chromosome combinations is 2n, where n is the number of | | |

|chromosome pairs. | | |

| | | |

|For humans 2n is 223 or 8,388,608 possible combinations. | | |

| |[pic] |

| |Where n=2, 2n= 22 = 4 possible combinations |

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Meiosis ____

Meiosis ____

Meiosis 2

Meiosis 1

[pic]

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