Biology 1 Exam Study Guide
Heritable feature (eye color)
Varient for a character (brown)
Law of Segregation
During the production of gametes the two copies of each hereditary factor segregate so that offspring azure one factor from each parent
Breeding of a recessive homozygote X dominant phenotype (but unknown genotype)
Law of Independent Assortment
When two or more characteristics are inherited, individual heredity factors assort independently during gamete production, giving different traits and equal opportunity of occurring together
Appearance between phenotypes of the two parents
Two alleles affect phenotype in separate, distinguishable ways
Genes have specific loci on chromosomes and chromosomes undergo segregation and independent assortment
What did Thomas Hut Morgan come up with?
Modes of heredity in pea plants
What did Mendel find?
Who found Genes located on chromosomes
Who discovered Bacterial work, transformation; change in phenotype and genotype due to assimilation of external substance (DNA) by a cell?
Who found out the the transformation agent was DNA?
Who found that the ratio of nucleotide bases?
Watson and Crick
Who found the double helix
A population or group of populations whose membranes have the potential to intebreed and produce viable, fertile offspring
The change over time of the genetic composition of population
A record showing us that todays organisms descend from ancestral species
Artificial breeding can use variations in populations to create vastly different breeds and varieties
A change in the gene pool of a population over a succession of generations
Changes in the gene pool of a small population due to chance (usually reduces genetic variability)
The Bottleneck Effect
Type of genetic drift resulting from reproduction in population such that the surviving population is no longer genetically representative of the original population
cause of genetic drift attributable to colonization by a limited number of individuals from a parent population
Genetic exchange due to the migration of fertile individuals or gametes between populations
Coexhistance of 2 or more distinct forms of individuals within the same populations
Differences in genetic structure between populations