Can there be two different versions of the same gene on different chromosomes?

Can there be two different versions of the same gene on different chromosomes?

Homologous chromosomes have the same genes arranged in the same order, but they have slightly different DNA sequences. Different versions of the same gene are called alleles (uh-LEELZ); homologous chromosomes often contain different alleles.

How can each gene differ from each other?

When genes mutate, they can take on multiple forms, with each form differing slightly in the sequence of their base DNA. These gene variants still code for the same trait (i.e. hair color), but they differ in how the trait is expressed (i.e. brown vs blonde hair). Different versions of the same gene are called alleles.

Can you have two humans with exactly the same genome?

Yes, it is very likely that two human can look very similar, possibly even identical, but they will never be genetically identical. The odds of this happening are so as close to zero as you can get. Yes, it is possible for two humans to be genetically identical, but so slim that our world may never see.

Do different cell types have the same genome Why or why not?

Thanks to gene regulation, each cell type in your body has a different set of active genes—despite the fact that almost all the cells of your body contain the exact same DNA.

What do we call an organism with two different versions of a gene?

An organism which has two different alleles of the gene is called heterozygous. Phenotypes (the expressed characteristics) associated with a certain allele can sometimes be dominant or recessive, but often they are neither.

What are different variations of the same gene known as?

Different versions of a gene are called alleles. Alleles are described as either dominant or recessive depending on their associated traits. Since human cells carry two copies of each chromosome? they have two versions of each gene?. These different versions of a gene are called alleles?.

How do dominant and recessive genes differ?

The difference between dominant and recessive trait is that dominant genes always passes the dominant behavior genes while the recessive ones pass the recessive behavior genes. These traits are expressed or received only in the case when both of the alleles are recessive.

What causes cells in living organisms to be different from one another?

The cell types in a multicellular organism become different from one another because they synthesize and accumulate different sets of RNA and protein molecules. They generally do this without altering the sequence of their DNA.

How can cells from the same organism have such different shapes and functions?

How can cells from the same organism have such different shapes and functions? During differentiation, different parts of the DNA in each type of cell are activated, resulting in the different structure and function of the cells.

Do different cell types have the same genome?

An Overview of Gene Control The different cell types in a multicellular organism differ dramatically in both structure and function. If we compare a mammalian neuron with a lymphocyte, for example, the differences are so extreme that it is difficult to imagine that the two cells contain the same genome(Figure 7-1).

What is the genome of an organism?

A genome is all of the genetic material in an organism. It is made of DNA (or RNA in some viruses) and includes genes and other elements that control the activity of those genes. Does everybody have the same genome? The human genome is mostly the same in all people. But there are variations across the genome.

Is the human genome the same in all people?

The human genome is mostly the same in all people. But there are variations across the genome. This genetic variation accounts for about 0.001 percent of each person’s DNA and contributes to differences in appearance and health. People who are closely related have more similar DNA.

Can two people have the same DNA?

Can two people have the same DNA? The possibility of having a secret DNA sharing twin is pretty low. Your DNA is arranged into chromosomes, which are grouped into 23 pairs.