Dihybrid Cross, Chi-square analysis, Pedigrees Flashcards
unit 2
what is Mendel’s principle of independent assortment
alleles on different pairs of chromosomes assort independently
when does independent assortment occur
during anaphase 1 of the meiotic cycle
the dihybrid cross will generate F1 parents that are _______ at each locus
heterozygous
Describe a test cross
the individual of unknown genotype must be crossed with a homozygous recessive individual
what information does a chi-square test give you
about how well observed values fit expected values. Indicates the probability that the difference between the observed and the expected values is due to chance (something other than mendelian genetics)
What is the equation for chi-square
x^2= [(O-E)^2]/ E O= observed E= expected
(autosomal recessive/dominant) usually appears in both sexes with equal frequency
recessive (both really tho)
(autosomal recessive/dominant) tend to skip generations
recessive
(autosomal recessive/dominant)
When both parents are heterozygous, approximately one fourth of the offspring will be affected
recessive
(autosomal recessive/dominant)
appears more frequently among the children of incest marriages
recessive
(autosomal recessive/dominant)
appears in both sexes with equal frequency
dominant (both really tho)
(autosomal recessive/dominant)
both sexes transmit the trait to their offspring
dominant
(autosomal recessive/dominant)
does not skip generations
dominant
(autosomal recessive/dominant)
affected offspring must have an affected parent unless they have a new mutation
dominant
(autosomal recessive/dominant)
when one parent is affected (heterozygous) and the other parent os unaffected, approximately half of the offspring will be affected
dominant
