Our prediction is that there is no difference between having twins once, then it happening twice, like what our problem is. The risks only increase each identical twin birth. The risks do not stack. When twins marry twins (called a Quaternary marriage) it does not increase the chance of twins. If they do have twins then they are at the same risk as their parents were, not more. Some risks do increase each generation and it will be greater than their parents. The children would have the same risks as if they just had one kid. As shown in the pedigree charts, as long as you have the same number of children, (like 2 pairs of twins or four children) all children are at the same risk.
Pedigrees
A pedigree chart is a diagram that shows the occurrence and appearance or phenotypes of a particular gene or organism that goes from one generation to the next.
Symbols that are used when drawing a pedigree.
A pedigree chart is a diagram that shows the occurrence and appearance or phenotypes of a particular gene or organism that goes from one generation to the next.
Symbols that are used when drawing a pedigree.
![Picture](/uploads/2/6/2/0/26201945/9207109.png)
In this case T=tall and t=short. So if one parent is Tt and the other is also Tt, and their children are tt and Tt, does it make sense?
Since a child must inherit one allele from each parent, and the child's genotype is tt and each parent has a t in their genotype, then it is possible.
The other child's genotype is Tt and one parent has a T and another has a t,so it also is possible.
Most pedigrees are more complex than this one and has more generations. They also normally have you find the possibilities of the genotype for different people based on what they already give you.
Since a child must inherit one allele from each parent, and the child's genotype is tt and each parent has a t in their genotype, then it is possible.
The other child's genotype is Tt and one parent has a T and another has a t,so it also is possible.
Most pedigrees are more complex than this one and has more generations. They also normally have you find the possibilities of the genotype for different people based on what they already give you.
A karyotype (Greek karyon = kernel, seed or nucleus) is the number and appearance of chromosomes in the nucleus of a eukaryotic cell(The defining membrane-bound structure that sets eukaryotic cells apart from prokaryotic cells is the nucleus, or nuclear envelope, which the genetic material is carried.).
1-22 are pairs of autosomal chromosomes and the X means there are a pair of X chromosomes like this XX meaning this would be a female.
1-22 are pairs of autosomal chromosomes and the X means there are a pair of X chromosomes like this XX meaning this would be a female.
This picture is a male because it is XY at the end. You can tell from the size. The X is big as shown in the picture above and then the Y would have to be the other one.