Lesson 16 - 10\/25\/16 - Genetics I Mendels 5-element model Parents transmit distinct information related to traits to their offspring Mendel called them

Lesson 16 - 10/25/16 - Genetics I Mendels 5-element model...

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Genetics I Mendel’s 5-element model Parents transmit distinct information related to traits to their offspring Mendel called them ‘factors’ We call them genes Each individual has 2 copies of every gene for a given trait - each individual receives one copy of each gene from each parent (diploid) Genes come in different forms or states that we call alleles An individual that has two of the same allele is homozygous An individual that has two different alleles is heterozygous 2 alleles are distinct and don’t blend Alleles are not equal - some alleles are dominant and mask the expression of recessive alleles Reminder about alleles Alleles are different states of the same gene - genes encode proteins, affect our traits A gene for fur color may result in white fur or brown fur There are different alleles for each state of the trait of fur color Over-simplistic, brown results from a protein called tyrosinase
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