The genes of identical twins are identical because the twins come from one egg that has split after fertilization. Fraternal twins are not identical since they come from two eggs but have occupied the mother's womb at the same time.
contain identical genes
to ensure the genes are identical
The premise of the question is flawed. Unless they are identical twins, siblings DO NOT receive the same genetic material from their parents. Normally, children receive 50% of the genes of each parent to create a new 100% combination. So you and your sibling have both inherited 50% of your father's DNA, for example, but you didn't get the same identical 50% as your sibling unless you're identical twins.
False.
the wedge and the inclined plane
thethave purebred genes thethave purebred genes
Identical twins. Although horses sometimes have twins I'm not sure if they have identical twins.
If their genetic makeup is identical then they are identical twins.
Depending on how they got identical genes, they may be clones (if it was done artificially, and they were born at different times), or if they were born at the same time, they could be identical twins. However, I don't think horses ever have twins.
No, because not all genes are selected from the parents. Identical brothers/sisters have exactly the same genes...the egg split just after genes were selected. They will sure look similar, though.
genes
they sure do
Yes
An organism that has genes that are alike for a particular trait is called homozygous for that trait. This means that it has two identical alleles for that specific gene.
A pair of genes that are identical are called alleles. Alleles are different forms of the same gene that occupy the same position on homologous chromosomes.
Two individuals can be highly similar in terms of chromosomes, genes, and alleles if they are closely related, such as siblings. They will share a significant portion of their genetic material due to inheritance. However, unrelated individuals will have more differences in their genetic makeup, with variations in chromosomes, genes, and alleles.
When breeders cross two genetically identical organisms the same genes have an increased chance of expressing themselves in the offspring. However, the offspring will also have genes from ancestors.