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11 Cards in this Set
- Front
- Back
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Incomplete Dominance |
*a condition in which the alleles are neither dominant nor recessive *resulting in a blending of traits *Example: red flowers crossed with white flowers produce pink flowers |
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Codominance |
*both alleles are expressed with no blending of characteristics *Example: if a red hair horse is crossed with a white hair horse a color pattern called Roan happens white and red hairs intermingled |
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Multiple Alleles |
*one of several alleles at a given locus *Example: blood type *Dominant alleles are represented by IA and IB *Recessive alleles are represented by lower case i |
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Dihybrid Cross |
*deals with 2 sets of contrasting traits at the same time *Example: dealing with height(tall/short), and pea color(yellow/green) in the same cross |
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Mendel's Concept of Independent Assortment |
*the segregation(separation) of one set of alleles during gamete formation is not affected by the presence or segregation of other sets of alleles |
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Polygenic Inheritance |
*2 or more genes working together result in a single trait *Example: human skin color |
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Sex-linked Traits |
*traits that have their genes on the X or Y chromosome, because they are linked to the sex of the individual *Y chromosome only found in males, contains genes for some male characteristics *X chromosome found in both male & female and contains genes for other traits |
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Sex Chromosomes |
*chromosomes that determines the sex of an individual in humans they are X and Y xx female xy male *father determines sex of child *y is smaller than x *some genes are carried on the sex chromosomes *x & y are not homologous
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Autosomes |
* other non-sex determining chromosomes *numbered *humans=22 pairs
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Sex Chromosomes |
*if there is a defective gene on X the Y would not have a normal gene to contradict it |
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Hemophilia |
*human blood disorder, lack of a blood chemical that allows for blood clotting *bleeder's disease *X-linked recessive trait *XH XH carrier female |
