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Human Trait Mixing Question

Genetics as it applies to evolution, molecular biology, and medical aspects.

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Human Trait Mixing Question

Postby Silverbackman » Thu Aug 04, 2005 6:19 am

Let us say a black haired brown eyes man had kids with a blonde hair blue eyes woman. Let 's assume they are both caucasion (Perhaps and Man from India having kids with a woman from Europe).

Is it possible for some of the kids of these two parents to have hybrid hair or eye color? For example could one of the kids have brown hair, a hybrid trait mix of black and blonde hair without it being mutations. Or for example a hybrid trait mix of blue or brown eyes (whatever color that produces). Could this be possible or are color trait mixing amoung homo sapiens something that cannot occur?
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Postby Dr.Stein » Thu Aug 04, 2005 6:30 am

Hair color, eye color, and skin tone are determined by polygenes, which is very complicated in their inheritance pattern.
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Postby Silverbackman » Fri Aug 05, 2005 5:52 pm

Yes I know this but can a fusion of traits between a black haired man and a blonde haired woman provide a hybrid of blonde and black? And is that brown? Has it ever happened or would the kids only have blonde or black hair?
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Postby sdekivit » Fri Aug 05, 2005 7:49 pm

when there's a mix, we have an intermediate crossbreeding. For example: white flowers are bred with red flowers (P-generation). Then in intermediate crossbreeding the F1 exists of 25% red and whit and 50% pink. Thus there's no domination of 1 allele
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Postby mith » Sat Aug 06, 2005 5:23 am

Let me rephrase the question for you,

Is hair color a case of incomplete dominance, codominance or simple dominance?
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Postby Dr.Stein » Sat Aug 06, 2005 8:43 am

As I told you, it is not that simple. The inheritance pattern of hair color, iris color, and skin tones do not follow any Mendellian Laws.
For example:
- Red-haired kid comes from brown-haired parents
- Grey-eyed kid comes from blue-eyed and brown-eyed parents
- White-skinned and dark-skinned parents will bear mullatos, but the skin he tone of among their F1 will never be the same

These phenomena caused by polygene, and it is so complicated.
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