GENETICS VOCABULARY. WHAT IS HEREDITY? The passing down of genes from parent to offspring.
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Transcript of GENETICS VOCABULARY. WHAT IS HEREDITY? The passing down of genes from parent to offspring.
- Slide 1
- GENETICS VOCABULARY
- Slide 2
- WHAT IS HEREDITY? The passing down of genes from parent to offspring
- Slide 3
- What are genes? Segment of DNA Determines a trait Trait is shown as a protein
- Slide 4
- Are all genes the same? A trait is a physical characteristic of your body: Hair Color Height Widows Peak Hitchhikers Thumb Are all the traits the same?
- Slide 5
- Alleles Different forms of a gene Usually represented by a letter. Each person gets two alleles for a gene ( one from mom/ one from dad)
- Slide 6
- What do alleles mean? Genotype- Combination of alleles in a person The letters Phenotype What trait the alleles show
- Slide 7
- Genotype forms Homozygous- Two of the same allele Heterozygous Two different alleles in a genotype
- Slide 8
- Examples- Mendel and his peas Was a monk Worked with peas to look at inheritance Was able to develop rules of inheritance
- Slide 9
- Mendels findings 1. Each person has two genes 2. Those genes can be different 3. Only one gene from each parent
- Slide 10
- Breeding experiments Determined some relationships between genes DOMINANT ALLELE- The trait will be expressed if this allele is present Usually it is the capital letter RECESSIVE ALLELE- The trait will only show up in phenotype if both alleles are present Usually it is the lower case letter
- Slide 11
- Dominant does not always mean allot! Polydactyly- Having extra fingers Due to two dominant alleles Not seen allot in population