inheritance of a characteristic controlled by a single gene
1 of 14
expected ratio of a monohybrid cross
3:1
2 of 14
dihybrid inheritance
inhertiance of two characteristics determined by two different genes on different chromosomes
3 of 14
sex linkage vs autosomal linkage
sex linkage involves the inheritance of a recessive allele on the X sex chromosome but autosomal linkage involves two or more genes carried on the same non-sex chromosomes
4 of 14
why do the results of a genetic cross rarely match the expected ratio?
each cross is independent of another so is not affected by each individual outcome
5 of 14
Mendel's law of independent assortment
each member of a pair of alleles may combine randomly with another pair
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Dominant allele
always expressed in the phenotype
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recessive allele
only expressed in the phenotype when the organism is homozygous recessive or there is no homologous pair (sex-linkage)
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co-dominance
both alleles expressed in the phenotype
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multiple alleles
where there are more than 2 alleles of which only 2 can be present on the loci of homologous chromosomes
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autosomal linkage
when two or more genes are carried on the same chromosome and so inherited together
11 of 14
sex linkage
an allele carried on a sex chromosome that is not covered by a homologous pair
12 of 14
epistasis
when the allele of one gene affects/masks the expression of another
13 of 14
Give the hardy-Weinberg equation
p^2+2pq+q^2= 1 and P+Q=1
14 of 14
Other cards in this set
Card 2
Front
expected ratio of a monohybrid cross
Back
3:1
Card 3
Front
dihybrid inheritance
Back
Card 4
Front
sex linkage vs autosomal linkage
Back
Card 5
Front
why do the results of a genetic cross rarely match the expected ratio?
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