Modes of Inheritance Flashcards
what is a carrier?
a heterozygous individual that carries the mutated allele but has a normal phenotype
what does a circle represent?
a female
what does a square represent?
a male
if two unaffected parents have an affected child,
the trait is recessive
if two affected parents have an unaffected child,
the trait is dominant
individuals with two x chromosomes have gene
redundancy
do males have x chromosome redundancy?
no (unless disjunction occurs)
in dominant diseases, the mutated allele makes
a new protein it’s not supposed to
in dominant diseases, there is a _______ of function
gain
in recessive diseases, there is a _______ of function
loss
True or False: Alleles for recessive disease usually cause a new protein to be made
False (loss of function)
Can there be carriers of dominant diseases?
No, if you have the allele, you will have the disease
what are semi-dominant diseases?
between dominant and recessive
if a person has one copy of an allele for a semi-dominant disease, that person will
have a milder case of the disorder
if a person has two copies of an allele for a semi-dominant disease, that person will
have the full blown disorder
