I have freckles. My husband doesn't. One of my three children does. I LOVE freckles!
2007-12-21 07:50:20
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answer #1
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answered by North 6
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Freckles Gene
2016-10-22 00:36:26
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answer #2
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answered by ? 4
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This Site Might Help You.
RE:
are freckles considerd a dominate gene?
like if ur husband has freckles right and you dont what are the chances of ur kid having them?..
2015-08-06 07:08:25
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answer #3
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answered by Anonymous
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Freckling is associated with the gene MC1R on chromosome 16. Freckles can appear with both the heterozygous or the homozygous recessive of this gene so do not follow Mendelian ratios.
http://sandwalk.blogspot.com/2007/03/human-mc1r-gene-controls-hair-color-and.html
http://www.thetech.org/genetics/ask.php?id=195
http://www.genomenewsnetwork.org/articles/08_01/Freckle_gene.shtml
http://www.eurekalert.org/pub_releases/2007-10/m-rha102607.php
Red hair is produced by the recessive dysfunctional MC1R that actually has 7-9 known alleles thought to associate with variants in red hair expression. The dominant functional MC1R produces darker colored hair and skin. MC1R contributes to skin and hair color by regulating the activity of melanin synthesis. Melanin exists in two forms in human skin and hair: eumelanin, which is a brown-black color and phomelanin, which is a yellow-red color. The relative ratio controls hair/skin color. People with dark hair convert most of their phomelanin to eumelanin using MC1R. The several recessive alleles convert only part of the phomelanin producing several shades of color strawberry blond to auburn.
A possible indicator of someone carrying the recessive MC1R can be freckles. However people can have freckles who do not carry the recessive for red hair.
OCA2 is also linked to skin freckles and moles. This gene is most common in in Sub-Saharan Africans and African-Americans than in other population groups. It often appears with light brown skin, and the hair may be brown, auburn, ginger or red.
Recently another freckle gene, on chromosome 4, was mapped but it has not been isolated yet. http://www.chinadaily.com.cn/english/doc/2004-04/11/content_322337.htm
Freckling seems to be a complex phenomena that may require the individual to carry some other gene in conjunction with MC1R or can produce freckles by another mechanism.
2007-12-21 10:28:06
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answer #4
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answered by gardengallivant 7
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Freckles are indeed dominant genes, and they are also pleotrophic genes which means that they are carried along with a chromosome during crossing over. That is why fair haired people are usually the ones who have them, both genes are somewhat associated or carried in the same chromosome.
2007-12-21 08:05:25
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answer #5
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answered by (Ω)Carlos S 2
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no they are recessive! hence 1 in 4 chances your child will get them if you have a gene for it!
2007-12-21 07:47:14
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answer #6
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answered by Trapped in a Box 6
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they are reccessive....but you have to look at the familty tree...i.e your parents...and all that and make a gene table and see the probablity of you childen having it....thas the best solution....don go tooooo far..but just look at the grandparents on the both sides..parents and you both....tht shud work...gud luck...
2007-12-21 07:55:32
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answer #7
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answered by Anonymous
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