second deck allele Flashcards
allele
a trait represented by a lower case or capital letter
genotype
a combination of letters for a trait
phenotype
a recognizable trait such as hair color
homozygous
having two of the same letters aa AA
heterozygous
having one capital and one lowercase letter Aa
dominant trait
a trait represented as a capital letter and covers up recessive traits
mitosis
the cell division of body cells
meiosis
the cell division of sex cells
identical twin
twins with identical dna
fraternal twins
twins that were born from two different egg and sperm cells
sex-link disorder
a genetic disorder on the x chromosomes
chromosomes
contains the dna of the cell
gene
one set of instructions for a trait
dna
molecule found in the nucleus that contains the cells info
dna replication
copying of dna
double helix
the spiral arrangement of dna strands
chargaffs rule
A always equals T and C always equals G
mutation
a change in the dna
deletion
when one base is left out
insetion
when there is an extra base added
substitution
when a base is substituted for another base
recessive trait
a trait that is shown as a lower case letter and is covered by a dominant trait
