genetics: the study of how traits of organisms are passed from...
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Genetics Notes
Genetics: the study of how traits of organisms are passed from parent to offspring.
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1. Heredity2. Genes3. DNA4. Chromosomes5. Sperm6. Egg7. Recessive Genes8. Dominant Genes
Brain Pop!
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1. heredity:passingdownfromparentstooffspring(kids)2. genes:DNAinheritedfrommomanddad3. DNA:informationthatisfoundinthenucleusofallyourcells4. chromosomes:DNAthatlookslikeX5. sperm:malesexcell6. egg:femalesexcell7. recessivegenes:genesthatgetcoveredup8.dominantgenes:genesthatcovereverything
Bill Nye Library Analogy
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Traits Inventory
Gregor Mendel
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- Gregor Mendel was the first person known to record evidence that traits of organisms are determined by factors passed from parents to offspring.- Born in 1822 in Europe- Father of Genetics
Mendel studied genetics by conducting breeding experiments with pea plants.
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Dominant TraitsA genetic factor that blocks another genetic factor
Recessive TraitsA genetic factor that is blocked by the presence of a dominant genetic factor
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GenesA section of DNA that has information about a specific trait of an organism
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Allele2 alleles make up a gene
PhenotypeThe visible traits and characteristics of an organism
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GenotypeThe alleles of all the genes on an organism's chromosomes
Uppercase letters represent dominant alleles
Lowercase letters represent recessive alleles
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EeAlleles for eye color
Allele for brown eyes (dominant) Allele for blue eyes (recessive)
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Homozygous: two alleles have the same information
Heterozygous: two alleles have different information
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Thegenotypecontains2alleles,onefrommomandonefromdad.Theseallelescanbeeitherdominantorrecessive.Ifthereareoneormoredominantallelespresent,thenthephenotypewillberepresentativeofthedominant.Iftherearenodominantallelespresent,thenthephenotypewilltakeontherecessivefeature.Thecombinationofgenotypeallelesdeterminethephenotype
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