0
There are a number of reasons:
First, the genes children inherit are half from their mother and half from their father, because the sperm and the egg each contain only half the genetic material necessary for an organism to develop. So even if no other factors created variability, children would be a mixture of their parents rather than identical to them.
Second, the alleles (versions of genetic code for a given feature) that end up in the sperm or egg are also random. Each parent has two alleles for each trait, which may or may not both be expressed. For instance, since brown eyes are a dominant trait, a brown eyed parent might actually have one brown eye allele and one blue eye allele. This parent would still have a 50% chance of passing the blue allele onto their child, despite the fact that it is not expressed in the parent.
Further variation can be added through mutations. These are errors that occur in DNA replication, causing the resulting organism to have a randomly created new gene that neither of the parents had.
Wiki User
∙ 7y ago
Wiki User
∙ 14y agobecause of the different mix of genes we get different physical traits we can look almost like one of our parents but we will never look like our parents
Add your answer:
Earn +20 pts
Why are the fingerprints of identical twin are different?
They arent your just blind
What can mutations do and do not do?
They can tell you what they are nd what they arent.....
What abiotic factors define the willamette valley?
things that arent alive einstien
If both parents have the same genotype and phenotype why does the offspring look different?
A change in genetic compounds occur causing allell's to reform and a genetic mutation to occur. This mutation causes the change.For example say you had 2 parents with both blue eyes, and you got brown eyes. Well normally the occurance of BB+BB (B = blue, b = brown ) would more than surely give you blue eye's seeing as all other compounds arent counted. Well it's a result of this genetic mutation that Bb+Bb happens even though your parents dont have brown eyes.It's like growing a finger out of your cheek. It's not normal but it happens.-Professor CsunSex
Why arent chromosomes always visible?
Chromosomes always visible because their not as spread out and easy to see as during metaphase.
Why arent children identical to the parents?
because your identity is split up many different ways bassed on your haritage. the simplest way to say it is: it just depends if one of your parents has several dominate traits
Why arent children identical to either of their parents?
Because they're a mixture of those parents; some from Mom, some from Dad. Occasionally, a child looks very much like one parent, but this is just appearance; exactly half of you came from each parent.
Why arent child re identical to either one of their parents?
Children share the traits of each parent. Each parent provides 26 chromosomes to the baby and DNA for the developing fetus. There are dominant and recessive genes that determine things like eye and hair color, so when a baby is born they have a combination of both parents DNA.
Why are the fingerprints of identical twin are different?
They arent your just blind
What is the importance of elders and grandparents in your family?
importance of elders and grandparents in your family?
Is Justin bieber parents hispanic?
no justins parents arent hispanic
Why can't male and female dwarf hamsters be in the same cage?
they will reproduce (make babies all the time) and if the parents arent satisfied they will eat the children
Is Jiaen from China?
Jiaen Guo is from Germany, but her parents arent. Her parents are from China.
Is osamba a human being?
if he isn't then you arent either
Are Miranda Cosgrove's parents divorced?
no they arent she has like a perfect life
Why arent children allowed to vote?
Because they are too young to understand politics.
Why are men like children?
because we arent scared to show our inner child.
