Why can people pass on traits that don't show up in them?

Answer 1

some traits are more common and getpast on easier

There are dominant and recessive traits-

Each person has 2 copies of a gene that codes for a certain trait-this is called the genotype (one from mom and one from dad)

Whichever trait is Dominant will be expressed- or passed on to you-

for instance darker pigments are usually dominant over lighter pigments so if a person has genes for blue and brown eyes- they will most probably have brown

fair skin or dark skin- probably dark

red hair or black hair- black

Answer 2

You have two copies of every gene - one from your mother and one from your father. The different variations of a specific gene are called alleles. Some alleles are dominant and override recessive alleles, so you have the phenotype (expressed trait) of the dominant allele although you have a copy of the recessive allele.

This is also possible if one of your alleles is a faulty copy and does not code for a functional protein. This is the case with cystic fibrosis - if you have one functional copy and one faulty copy of the CFTR gene, you are a carrier for cystic fibrosis but typically have no signs or symptoms yourself.

Answer 3

People can pass on traits that don't show up in them through recessive genes. A recessive gene can be carried by an individual without being expressed if the dominant gene is present. However, this recessive gene can still be passed on to offspring and expressed in future generations if paired with another recessive gene from the other parent.

Answer 4

Because the genes are recessive. if there is no dominant gene to tell what's going to happen in that genetic code area, the recessive genes will take place.