genetics

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  • Created by: divya123
  • Created on: 07-12-20 14:36
phenotype
observable characteristics of an organism
- result of the interaction between the expression of the genotype and the environment
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genotype
- genetic makeup of an organism
- describes all the alleles an organism has
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gene
- is a length of DNA that is a sequence of nucleotide bases that normally code for a particular polypeptide
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alleles
- one of the different forms of a gene
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homozygous recessive
both alleles recessive
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homozygous dominant
both alleles dominant
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heterzygous
one dominant one recessive
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co dominant
both alleles are expressed in the phenotype
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multiple alleles
where there are more than two alleles where both are equally dominant
both alleles of a gene is expressed in the phenotype
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example of multiple allels
in blood groups 1o 1a 1b
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sex linkage
a gene that is carried either on X or Y chromosome (no alleles on Y )
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pedigree charts
- male square
- female circle
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autosomal linkage
any two genes that occur on the same chromosome than isnt a a sex chromosome
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epistasis
when the allele of one gene masks the expression of another in the phenotype
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when to use dihybrid crosses
when looking at two different traits e.g. seed colour and shape
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when to look at monohybrid crosses
when only looking at one trait
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Other cards in this set

Card 2

Front

genotype

Back

- genetic makeup of an organism
- describes all the alleles an organism has

Card 3

Front

gene

Back

Preview of the front of card 3

Card 4

Front

alleles

Back

Preview of the front of card 4

Card 5

Front

homozygous recessive

Back

Preview of the front of card 5
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