Dna, Genetics, and Heredity- Biology 9

Introduction to Genetics & Heredity and Structure & function of DNA

Where is DNA Found

Primarily found in the nucleus of eukaryotic cells, organized into chromosomes

What does the DNA do?

provide information on how to build and operate an organism to replicate itself.

What are the components of DNA?

The components of DNA are nucleotides, which include a phosphate group, a sugar (deoxyribose), and nitrogenous bases.

What are the 4 nitrogenous bases?

The four bases are A (adenine), T (thymine), C (cytosine), and G (guanine).

What are anitparallel strands?

two strands that run in opposite directions so bases line up correctly.

What are hydrogen bonds?

The strands that are held together by weak hydrogen bonds which makes it easy to seperate them during replication.

Alleles

represent the different variations of a gene.

Homozygous

both alleles are identical