what isthe difference between dominant and recessive genes?

Answer 1

Different genes for the same trait, which give rise to different phenotypes, are known as alleles.

Organisms such as the pea plants Mendel worked on, along with many plants and animals, have two alleles for each trait, one inherited from each parent.

Alleles may be dominant or recessive; dominant alleles give rise to their corresponding phenotypes when paired with any other allele for the same trait, while recessive alleles give rise to their corresponding phenotype only when paired with another copy of the same allele.

For example, if the allele specifying tall stems in pea plants is dominant over the allele specifying short stems, then pea plants that inherit one tall allele from one parent and one short allele from the other parent will also have tall stems. Mendel's work found that alleles assort independently in the production of gametes, or germ cells, ensuring variation in the next generation.

Answer 2

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RE:
what isthe difference between dominant and recessive genes?

Answer 3

Everyone has a mix of dominant and recessive genes. Genes come in pairs- one from your mother and one from your father. A dominant gene will always be expressed over a recessive gene. The only way recessive genes get expressed if both of your genes from your mother and fater are recessive. For example, say brown eyes are dominant and blue are recessive (dunno if that's true). The only way you end up with blue eyes is if you get that gene from both parents. If you get one brown and one blue, brown wins out because it's dominant.

Answer 4

Quite simply, dominant genes are more likely to be passed down to a child than recessive genes.
Here's an example:
A woman has black hair and blue eyes. Her husband has blonde hair and brown eyes. Their child will most likely have brown eyes and black hair, because black hair and brown eyes are dominant genes, while blonde hair and blue eyes are recessive. It is, of course, still possible for the child to be blonde and blue-eyed, only less likely.
However, if the father had blue eyes too, it would be most likely that the child would have blue eyes. Grandparents are also a factor: say that both parents have blue eyes, but one or more of the child's grandparents (or anyone down the genetic line, actually) has brown eyes. It is therefore also possible for the child to have brown eyes.

Hope that helps. ^-^