No. First cousin share 1/8 of your variable genes and only 1/32 with second cousins. With third cousins you share only 1/128.
You would share approximately 12.5% of your DNA with a first cousin. This is because you share a pair of grandparents with your first cousin, resulting in genetic similarities but less than with a sibling.
Not very likely the other will test as high because the two cosins are from two different parents with two totally different DNAs. Only one that might come close to matching a test is an identical twin. I wold say cousin number 1 is the parent!
Recombination frequency is a measure of the likelihood of two genes being inherited together during reproduction. Genetic distance is the physical measure of the separation between two genes in a genome. There is a direct relationship between recombination frequency and genetic distance - as the genetic distance between two genes increases, the likelihood of recombination events between them also increases.
If you have a child with your first cousin, you have a very small chance of the child having a genetic disorder, a few percent at most unless you are a member of an ethnic group that already has a genetic disease in its genome. If you have a child with a more distant cousin, the chances are even less.
sturtevant
A first cousin twice removed does not have a particularly close genetic relationship.
You have a genetic relationship with every first cousin, whether once, twice or 15 times removed. The further removed the slighter the relationship.
You have a genetic relationship to every first cousin, whether once, twice or fifteen times removed. The greater the level of removal, the more distant the relationship.
Yes of course you do because you will share common ancestors such as great grandparents. All humans have a genetic relationship with each other, but the more closely you are related the more genetic features you will share. Being cousins twice removed is not close enough to prevent a sexual relationship (in law) if that's what's on your mind.
You share one of your grandparents with your first cousin, twice removed. From the point of view of your first cousin twice removed, the ancestor shared with you is his or her great great grandparent. Since you have 4 grandparents, you have received roughly 1/4 of your genetic heritage from each one. Since your cousin twice removed has 16 great great grandparents, he or she has received 1/16th of his genetic heritage from the one she shares with you. So almost 94% of your twice removed cousin's genetic heritage is from ancestors not related to you. And 75% of your genetic heritage is from ancestors not related to your twice removed cousin. This is a relatively distant relationship, although many others are even more distantly related than that.
Basically First cousins mean you have the same grandparents, but twice removed means there's TWO generations between you. So they are much older or much younger than you. see related links. Whether that is a close or distant cousin relationship is a matter of opinion and circumstance.
If it is your first cousin, they are your first cousin once removed.
Your first cousin's child is your first cousin once removed.
Your first cousin's granddaughter is your first cousin, twice removed.
That depends entirely on what you mean by "close." In most states, it is legal to marry a first cousin, so in that sense the state has descided that the relationship is not all that close. On the otherhand, first cousins who grow up close to each other are often considered almost part of the nuclear family.
You mother's first cousin is your first cousin, once removed.
The child of your father's first cousin is your second cousin.