evolution

Skin color, height, eye color and weight.

development of a new species from 2 different species that can interbreed

some offspring produced from speciation will be sterile (sterile hybrids are not a true new species since they can’t reproduce)

occurs when individuals migrate between populations and interbreed

changes in the composition of the gene pool die to chance (disease wipes out a certain # of the population).

mates are choose based on a certain phenotype and their proximity.

any change that alters the DNA sequence and is passed on to future generations.

reduces the number of genes in a population by eliminating many individuals.

occurs when a new colony is started by a few members of the original population. This small population size means that the colony may have:

reduced genetic variation from the original population. a non-random sample of the genes in the original population.

Mutations, Assortive Mating,Genetic Drift,Gene Flow, Speciation

is a natural process in which specific variations are selected for over time due their ability to increase an individuals suitability to the

s a measure of an individuals reproductive success and genetic contribution to future generations. being able to reproduce

describes the process of change over time

is influenced by both genetic make-up and behavioral modifications.

Biodiversity

is the total combination of genes present in a population and allows organisms to adapt andsurvive in a changing environment

are caused by a recessive genotype (tt)

are individuals with a heterozygous genotype, with the recessive allele coding for an inherited disorder.

are caused by either a homozygous dominate or heterozygous genotype.

Examples: Huntington’s Disease and Achondroplasia

Examples include: Tay-Sach’s, Albinism, Cystic Fibrosis

this is when an offspring has a blending of their parents phenotypes.

occurs when multiple alleles exists for a given gene and more than one of them is dominate.

alternate version of a gene

genetic make-up of an organism

physical manifestations of the genotype

made of 2 different alleles (Tt)

made up of 2 of the same alleles (TT)

units of heredity

is a combination of genotype and environment

may lead to reduced genetic variability following some large disturbance that removes a large portion of the population. The surviving pop

may lead to reduced variability when a few individuals from a large population colonize an isolated habitat.

due to the limited supply of resources organisms must fight to get their share (water, space, food, shelter)

are remnants of organs that have lost their ancestral function

share a functional similarity but arose from different evolutionary origin (insect wings and bird wings).

are similar in function and structure between organisms, suggesting a common ancestor