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Hand clasping is the superposition of each finger of
one hand over the corresponding finger of the opposite hand. When clasping
the hands, a person tends to interlace the fingers in one of two ways.
People who hold the fingers of the right hand above the
left fingers are classified as phenotype R (right), while those who hold the
fingers of the left hand above those of the right are phenotype L (left).
Although some people do not exhibit a preference for
one type of hand clasping, most do. Once adopted, the method of hand clasping
tends to be consistent throughout life. When an individual attempts to clasp
the hands in the opposite configuration from the usual one, that person may
feel a sense that something is out of the ordinary.
(Your humble blogger
is a strong L).
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Showing posts with label Genetics. Show all posts
Showing posts with label Genetics. Show all posts
Wednesday, April 24, 2019
HAND CLASPING
Saturday, November 24, 2018
IF IDENTICAL TWINS MARRY IDENTICAL TWINS HOW GENETICALLY SIMILAR WOULD THEIR CHILDREN BE?
Identical
twins Brittany and Briana Deane first met identical twins Josh and Jeremy
Salyers last August at The Twins Day Festival in Ohio. A year later, the couples
had their weddings, together, wearing the same wedding outfits, at this year's
Twin Day Festival. Their weddings were documented for a TLC special called
"Twins Marry Twins," scheduled to air in 2019.
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When
identical twins reproduce with identical twins the resulting children are
genetically indistinguishable from full siblings.
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DOUBLE COUSINS
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Double first cousins arise when two siblings reproduce
with another set of siblings and the resulting children are related to each
other through both parents' families. Double first cousins share both sets of
grandparents in common and have double the degree of consanguinity than
ordinary first cousins. Genetically they are as related as half-siblings.
Their coefficient of coancestry is 1/8th or 0.125. While double first cousins
have the same coefficient of coancestry (1/8) as half-siblings, they do have
higher chances of sharing BOTH alleles (1/16 vs. 0) and lower chances of
sharing one allele (3/8 vs. 1/2) with each other than half-siblings.
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When identical twins reproduce with siblings the
resulting children are more related than half-siblings but less related than
full siblings.
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Children of double first cousins are double second
cousins.
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