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19 Cards in this Set
- Front
- Back
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Gregor Mendel
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father of modern genetics (1850s)
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Law of Dominance
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Two organisms that are homozygous for two opposing traits are crossed equals a hybrid with two different Alleles. Dominant trait proceeds. Recessive is hidden.
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Law of Segregation
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During the formation of gametes the two traits carried by each parent are separated.
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Monohybrid Cross
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Cross between two organisms that each have the same hybrid trait.
Tt x Tt TT, Tt, tt |
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Homozygous dominant
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(TT)
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Heterozygous
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(Tt) or AB
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Testcross or Backcross
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way to determine and individual is Homozygous dominant or Heterozygous
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Codominance
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Both Traits Show! MM NN or M and N
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Hybrid
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Ai
Bi Bb |
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Incomplete Dominance
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Blending RR x WW = R and W
RW x RW = RR or RW or RW or WW |
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46 Chromosomes
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44 (22 pairs) Autosomes and 2 sex chromosomes
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Pedigree
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Family tree that indicates the phenotype of one trait being studied
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Mutation
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Gene mutation and chromosome mutation
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Gene mutation
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change in DNA sequence
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Chromosome Mutation
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deletion or addition of chromosomes
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Nondisjunction
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error that sometimes happens during meiosis
homologous chromosomes fail to separate One gamete receives two homologues while the other recives none. |
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Aneuploidy
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abnormal amount of chromosomes
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Trisomy
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Chromosomes that present in triplets
Down syndrome (3) #21 chromosomes trisomy-21 |
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Polyploid
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organism with more than 3 sets of a chromosome
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