Which sentence is correct? all cells have the same genes, but different genes are active in different cells. lungs look different from the heart because the cells that make up these organs have different genes. all cells have the same genes, and all of a cell's genes are active at the same time. as cells and tissues differentiate, they lose some of their genes.

All cells have same genes, but different genes are active in different cells

Explanation:

       Most living organisms are made up of different kinds of cells specialize in performing various functions like nerve cells perform different functions than blood cells. But all the cells are composed of same set of genetic information.

Since biochemical function is found out mainly by some specific enzymes, different sets of genes must be turned on and off in the various cell types to perform different functions. This is how cells differentiate for different functional capabilities.

you know they are heterozygous for a trait because they have it as jj or jj.