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SP Mendelian Genetic

QuestionAnswer
ALL CELLS in your body (except gametes) are diploid
sections of DNA that provide instructions for making protein genes
different versions of the same gene alleles
the matching chromosomes from our mom and dad Homologous Chromosomes
Father of Genetics Gregor Mendel
Laws of Inheritance Law of Dominance Law of Segregation Law of Independent Assortment
Cross mating of 2 organisms
P parental generation
F1 first generation
F2 second generation
Law of Dominance A dominant (strong allele) will express itself over a recessive (weak) allele
Dominant allele will always have that trait expressed (seen). Ex. BB or Bb
Recessive allele will only have that trait expressed when the dominant allele is NOT present. Ex. bb
Genotype – the actual alleles inherited Ex. AA, Aa, or aa
Phenotype the physical characteristics or traits of an organism. Ex. purple flowers
Homozygous – 2 of the SAME alleles ; AA or aa
Heterozygous 2 DIFFERENT alleles. Aa
Law of Independent Assortment The assortment of chromosomes for one trait doesn‘t affect the assortment of chromosomes for another trait.
Monohybrid Cross A cross between two organisms looking at one trait
Law of Segregation When chromosomes separate in meiosis, each gamete (egg or sperm) will receive only one chromosome from each pair.
AA Homozygous Dominant Genotype
Aa Heterozygous Genotype
aa Homozygous Recessive Genotype
If two heterozygous parents are crossed, what percent of the offspring would be homozygous recessive? 25%
If two homozygous dominant parents are crossed, what percent of the offspring would be heterozygous? 0%
What type of plant did Mendel use for his research? Pea Plant
Created by: tmsullivanLDHS
 

 



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