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.