Dimples ata
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Transcript of Dimples ata
DIMPLESBY
AMAYA TELLO ÁLVAREZ
MY FAMILY TREE
Explanation
Dimples are considered mark of beauty and loveliness. The truth is that dimples are actually genetic defects that are caused by shortened facial muscles. Generally, They are inherited facial traits that are passed from one generation to the next. Dimples often occur on both the cheeks. A single dimple on one cheek is a rare phenomenon. They occur due to:
Transfer of dimples from parents to children: occurs due to just one gene. The dimple creating genes are present in the sex cells prior to the process of reproduction. Each parent provides one of these genes to the child. So, if both the parents have dimples, the children have 50-100% chances of inheriting dimple genes.
Dimples can be also passed through multiple generations. The frequency with which a heritable trait is carried forth through genes is called penetrance.
Apart from that, sometimes the dimples may also be caused from spontaneous mutations that result in a dent in the cheek or a cleft chin that leads to dimples.
Reduced penetrance allows a generation to skip having dimples, although they may appear in subsequent generations. It occurs when one person inherits certain genetic trait along with another trait that suppresses it.
I have dimples but my parents don’t. I think my dimples are caused by reduced penetrance because my mother’s parents have them.
Dominant: have dimples
Recessive: don’t have dimples
Male Female
FATH
ER
SID
EM
OTH
ER
SID
E
Aa aaaa aa
Aa Aa aa aa aaaaaaaa
ME
aa aa aa aa aa aa
aa aa
aa aa
aa A_
A_