The flashcards below were created by user
acook09
on FreezingBlue Flashcards.
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polymorphism
gene variant is in less than 1% of population
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Sex-linked
- inheritance of genes that are unique to a sex chromosomes
- pseudoautosomal genes – genes on both sex chromosomes appear to be on autosomes
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Sex-influenced
- An allele is expressed differently in each sex.
- Behaving dominantly in one sex and recessively in the other
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Sex-limited
An allele is only expressed in one or the other sex
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allelic series
Dominance hierarchy will exist for multiple alleles
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Lethal alleles
- versions of genes w/potential to cause the death of the organism
- typically mutations in essential genes
- recessives and dominant inheritance patterns
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Nonessential genes
- are those not absolutely required for survival
- mutation deleterious
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Essential genes
- are those that are absolutely required for survival
- The absence of their protein product leads to a lethal phenotype
- It is estimated that about 1/3 of all genes are essential for survival
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