17-1 Genes And Variation Flashcards
A(n) ________ consists of all the genes, including the alleles for each gene, that are present in a population.
Gene pool
Natural selection works on an organism’s __________ rather than it’s __________.
- Phenotype
2. Genotype
A gene pool typically contains different __________ for each heritable trait.
Alleles
The number of times that an allele occurs in a gene pool compared with the number of times the other alleles for the same gene occur is called the ____________ of the population.
Allele frequency
A genetic material change of a cell is a ___________.
Mutation
How do mutations effect evolution?
Only when it effects the reproducing
2 ways genes can recombine during meiosis
- Independent assortment of chromosomes
2. Gene swapping
___________ happens when genes are passed to organism that aren’t offspring.
Lateral gene transfer
The number of __________ produced for a given trait depends on how many genes control the trait.
Phenotypes
Height in humans is an example of a ___________ trait.
Polygenic
Each gene of a polygenic trait often has two of more ___________.
Alleles
A single polygenic trait had many possible ____________.
Genotypes
A symmetrical bell-shaped graph is typical of ____________ traits.
Polygenic
Single genes are…
- Controlled by 1 gene
2. Only 2/3 distinct Phenotypes
Polygenic traits are…
- Controlled by 2 or more genes
2. May have many Phenotypes that aren’t clearly distinct