Why do me and my sisters look different? Dominate and resesive genes....?

Question

I understand the resesive and dominate genes stuff. But if all that is true why arnt me and my sisters identical? So I guess my question is do resesive and dominate genes change? But if they dont how come me and my sisters dont look alike?

Answer 1

It just depends on which dominant and which recessive genes you got. Each egg and each sperm have half the genetic material to create a person. Each one is a little different.

Answer 2

K. First off I don't think your really getting the whole dominant/recessive gene thing. Humans have 46 chromosomes that control everything in their body( Hair/eye color, sex, build....), an egg cell and a sperm cell each only have 23 pairs each. These pairs are a random mixing of a persons genes. So while yes your sister has the same parents as you she does not have the same genes resulting in different appearances. The only way she would look like you is if you were identical twins( a fertilized egg that divides into two embryos) not to be confused with fraternal twins two separate eggs fertilized by two separate sperm at the same time.

Answer 3

Each individual parent has two genes for each quite specific trait; bean plants have only 7 different traits, while humans have probably a hundred. In humans, many traits carry more than two genes, such as six genes, unlike in bean plants. In the case of the two genes, when a child is being created, one gene from each parent is randomly paired with one gene from the other parent. This allows offspring to vary much from their parents and siblings. It is even more complex with more than two genes (ex. AAaaa five genes or AABabb 6 genes) per trait.

Answer 4

nicely, the highschool biology instructions were ordinarily nicely perfect, yet oversimplified. college biology would have cleared this up somewhat. it isn't organic dominant/recessive, and it really is accessible for first era asian/white mixes to have blue eyes -- my son does, although neither my husband (brown) or I (eco-friendly) do. His visual charm is a distinct mixture of both human beings; I in basic terms befell to impact the interest colour more effective. it really is likewise particularly difficulty-loose to confirm 2 toddlers from an same father and mom have very different pores and skin and eye colorations, fairly with mixed young children. One baby would have a dismal complexion even as the subsequent is diminished.

Answer 5

i depends on what looks different about u and ur sisters.. Genes dont change but genes can be passed down from previous generations

Answer 6

you have a total of 23 pairs chromosomes, half from your mom and half from your dad. your chromosomes contain the DNA that codes for your genes, for example the color of your eyes or the shape of your nose.
since your mom gave you a "random" assortment of half of her 46 total chromosomes and your dad did the same thing, your sisters could have very easily gotten a different combination of these genes. so, for example, you could have the same eye color as one of your sisters but a completely different nose shape from her and still be her real sister.

Answer 7

Becuase you could have gotten different genes from parents than your sisters, different ages some similarties.

Answer 8

They do change thats why for example one brother could be rightn handed and another could be left handed...its all a matter of what genes you get, and there are a lot of them. . .

Answer 9

Better have a long, deep talk with your mom.....maybe they aren't all the same genes.

Answer 10

it's spelled dominant !! Maybe you have different fathers & don't know it