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Terms in this set (13)
in a pedigree: how are males represented?
in a pedigree: how are females represented?
in a pedigree: how are matings represented?
horizontal line between the pair
in a pedigree: how are individuals affected with the trait represnted?
what are the key characteristics of autosomal dominant pedigrees?
- no skipped generations
- phenotype of interest caused by dominant allele
- children with phenotype have at least one parent with phenotype
what are the key characteristics of autosomal recessive pedigrees? what is a carrier in an autosomal recessive pedigree?
-phenotype can skip generations
-children with phenotype can have both parents without phenotype
-heterozygotes called carriers
Complete dominance: explain the genetic inheritance pattern. give an example of this type of inheritance.
one allele is completely dominant over another. Red (dominant) flower and a white flower reproduce to create a red flower
Incomplete dominance: explain the genetic inheritance pattern. give an example of this type of inheritance.
one allele is not completely dominant over another. red and white flowers reproduce to create pink flowers
codominance: explain the genetic inheritance pattern. give an example of this type of inheritance.
heterozygotes have both phenotypes fully expressed. A blood type and B blood type reproduce to create AB blood type
many genes may have more than alleles. how many alleles are involved in rabbit coat color, what are these alleles, and what is their order of dominance?
(most -->) C- dark gray, Cch-chinchilla, Ch-point restricted, c- albino
what is a sex-linked gene?
locus on the X or Y chromosome
what does it mean to say that two genes are linked?
they are located very close to each other on the same chromosome
what is the term for the situation where one gene influences the phenotypic expression of a different gene? describe the two genes, and the alleles of each gene, involved in the labrador color.
Allele: B-black, b-brown
pigment deposition gene: E- permits deposition, e-prevents deposition
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