BIOL
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Sex linkage
Meiosis can explain Mendelian inheritance patterns
Sex chromosomes and meiosis
Inheritance of an X-linked trait
Pedigree analysis
BIOL
114 Home
Sex chromosomes and meiosis
Inheritance of an X-linked trait
Pedigree analysis
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 Autosomal
Recessive.
Trait appears rarely, only when two parents by chance carry the hidden
allele.
 Autosomal
Dominant.
Trait
appears in every generation, in about half of descendants (assuming a heterozygous
carrier.) |
 X-linked
Recessive.
Mother passes on to half of sons; half of daughters carry it.
Father never passes on trait.
X-linked Dominant. Father passes trait to all daughters;
no sons. Mother passes on to half of children. |
Pedigree:
Which of the four
alleles (M1-M4) is linked to this disease?
