What are the 3 components of a nucleotide?
carbon sugar, phosphate group, nitrogenous base
What are the 3 differences between DNA and RNA?
DNA- double stranded, contains deoxyribose sugar and thymine base
RNA- single stranded, contains ribose sugar and uracil base
What are the complementary base pairs in DNA and RNA?
DNA- Adenine to Thymine, and Guanine to Cytosine
RNA Thymine to Uracil, and Cytosine to Guanine
Which two nitrogenous bases are purines? pyrimidlines?
purines: adenine and guanine
pyrimidlines: cytosine and thymine
what is a chromosome?
threadlike structure of nucleic acids and proteins for in the nucleus
carrying genetic information in the form of genes
what is a gene?
sequence of DNA that codes for a protein and determines a trait
what does each gene produce?
How many pairs of chromosomes are found in humans?
How many chromosomes are found in a normal body cell?
How many chromosomes are found in a sex cell?
Where do the chromosomes in each pair come from?
one from each parent