Genes

hundreds to thousands of genes

A single chromosome is composed of _________.

segments

All chromosomes are made up of _______ called genes, which code for particular proteins.

recessive

An allele whose trait can be masked is called ________.

genes

Chromosomes contain segments of DNA that code for specific traits. What are these segments called?

cell

Inside every _______ of every organism on Earth is a molecule called deoxyribonucleic acid (DNA).

proteins

A gene contains instructions for assembling __________.

hereditary trait

A gene is a specific region of DNA that codes for a particular ________.

dominant

If an allele codes for a version of a trait that will mask its other version, the allele that shows is called _______.

chromosomes

On what cell structure are genes found?

mutations

Sickle cell anemia occurs when a DNA sequence with bases GAA is replaced by GTA. THe replacement of bases in the DNA molecule is caused due to ________.

the sequence of bases on its DNA

The genetic code of an organism is _________.

heredity

The study of how traits are passed from parent to offspring is known as ________.

A gene is a piece of DNA that contains the information necessary for the cell to make one protein. Genes code for all of the proteins in our bodies, and are responsible for many of our physical traits.

What is a gene?

Genes are located on chromosomes, which are large pieces of DNA contained in a eukaryotic cell's nucleus.

Where are genes located?

in the nucleus

Where are most of the genes found in a eukaryotic cell?

Identical twins

_______ have exactly the same DNA, and they look alike.