genetics Flashcards
carriers
a person or other organism that inherits a recessive allele for a genetic trait or mutation but doesn’t show the trait or show symptoms of the disease.
sex-linked traits
sex-linked traits are traits that are associated with genes found on sex chromosomes.
polygenic traits
trait controlled by two or more genes
multiple alleles
three or more alleles of the same gene
codominance
when both alleles of a gene contributes the phenotype of the organism ( a roan cow)
incomplete dominance
when one allele is not completely dominant over another (mix of both parents)
f1 v f2 generation
why is it important
f1- our parents
f2- me and my siblings
It is important because a recessive allele is gonna skip a generation and a dominant allele is in every generation.
genotype vs phenotype
a genotype is the numbers or gene combination an organism has. a phenotype is the physical characteristic of an organism/the way they look
homozygous vs heterozygous
homo- two identical alleles for a particular trait
hetero- two different alleles for the same trait
mendels 3 laws
- law of independent assortment: separate traits are separately inherited
- law of dominance: there is dominant and recessive trait
- law of segregation: everyone has 2 alleles for every trait and these trait segregate randomly during meiosis
why were pea plants a good choice?
they are easy to grow and easy to raise, and they have many visible characteristics.
gene vs trait vs allele
trait= a specific characteristic that varies from one individual to another gene= a sequence of DNA that codes for a protein thus determines a trait allele= are the different possibilities for a given trait