DNA
What is a "strand" of DNA?
two long polynucleotide chains composed of four types of nucleotide subunits
what are some genotypes?
AA,AS,As,aa,SS
What is an example of codominance in the ABO blood group system?
type AB blood
What are the 5 factors of allele frequency?
mutations, genetic recombination, gene flow or gene migration, genetic drift, natural selection.
what is ecological pyramid science facts?
a graphical representation of the energy found within the trophic levels of an ecosystem
what does DNA look like?
a ladder
How many genotypes do we have?
six genotypes
An organism physical appearance is best defined by which terms?
phenotype
Are there 2 alleles for every gene?
We have two copies of every gene
Who gave ecological pyramids?
Charles Elton
What information is coded into DNA?
the instructions for all the proteins the organism to heal a wound
each is 25%
when one allele is not completely over the other what is it?
incomplete dominance
What determines allele frequency?
counting how many times the allele appears in the population then dividing by the total number of copies of the gene.
hat type of ecological pyramid would be?
inverted biomass pyramid.
How many strands make up a DNA double helix?
two complementary strands
how does genotype work?
determines differences in genetic complement by comparing a DNA sequence to that of another sample or a reference sequence.
What are traits of codominance?
traits that are expressed by codominant genes
How are alleles formed?
New alleles can be formed as a result of mutation
How many levels are there in an ecological pyramid?
a maximum of four trophic levels
when do cells duplicate their DNA?
During mitosis
what determines a phenotype?
genotype and environmental factors.
what is the importance of codominance?
allowing the determination of genotypes and allele frequencies at loci.
Why do we have two alleles?
we only get one copy of a parent's chromosomes
What is the purpose of an energy pyramid?
illustrates how energy flows through an ecosystem.