'Extra dna' presentation slideshows

Cell Structure & Function

636 views • 44 slides

Mutations

Mutations. Genetic Changes. What is a mutation ?. A change in the base sequence of DNA. What causes mutations?. Mistakes in replication (spontaneous) Mistakes in base pairs Environmental factors (mutagens) High energy radiation (X rays, UV rays)

325 views • 22 slides

Protein synthesis

419 views • 21 slides

DNA ? RNA ? Protein ? Function

376 views • 17 slides

1 Review What is a molecular clock

1 Review What is a molecular clock Explain Why do molecular clocks use mutations that have no effect on phenotype 2 Relate Cause and Effect Why is gene duplication important in evolution 3 Infer In evolution, why have small changes in Hox genes had a great impact.

618 views • 13 slides

Mutations

Mutations. The fat cat ate the wee rat ???. Point Mutation. = a simple change in one base of the gene sequence. This is equivalent to changing one letter in a sentence, EXAMPLE: where we change the 'c' in cat to an 'h': Original - The fat cat ate the wee rat.

317 views • 6 slides