Inheritance/punnet squares Flashcards
What does inheritance mean
Characteristics they adopt from there parents
what does alleles mean
different versions of the same gene
what is a dominant allele
an allele that overrides the other allele and determines how to organism appears and the recessive allele is hidden
what does heterogeneous mean
when the organism with two different alleles of a gene
what does homozygous mean
characteristics those where the 2 alleles are the same arc called homozygous
what does genotype mean
alleles an organism has
what does phenotype mean
how does the organism appears
what is the punnet square
predicts the genotypes and phenotype for offspring produced by 2 parents
what is the punnett square
predicts the genotypes and phenotypes for offspring produced by 2 parents
show how is the punnet square layed out
parents gametes are shown at the top
possible alleles in the gametes are at the top of the column and start of each row
each square shows the result of the alleles
give examples of inherited disorders
systic fibrosis (cf) caused be a recessive allele
pterodactyl (having a extra finger or toe) caused by a dominant allele
what can gene therapy and screening do
reduce the symptoms of people with cyctic fibrosis.
embryo screening can be used to detect genetic disorders in embryos and alter the human genome and to abortion should a genetic disorder be detected (some people have ethical objections)
