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Recessive Lethal Allele
Lethal as a homozygote but has no effect on viability in the heterozygous condition.
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1:1 Phenotypic Ratio
The outcome of a heterozygote by recessive homozygote cross.
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Co-dominance
The heterozygote has two functional alleles.
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Pleiotropy example
Recessive Lethal Alleles
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Autosomal
Not a sex chromosome
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Anaphase 1
Partly responsible for independent segregation
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9:3:3:1 ratio
Expect for two genes, each with two alleles, dominance and sorting independently.
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Incomplete Dominance
The heterozygote has an intermediate phenotype
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Homologous chromosomes
Pair of chromosomes sharing 90% sequence identity
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1:1 Genotypic Ratio
The outcome of a heterozygote by homozygote cross.
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Allele
A variant of a gene