bio lab 2 Flashcards
what is a allele
the many forms of genes a taht are stores in homologous pairs of chromosomes
how are alleles passed
they are passed on by homologous chromosomes segregate in meiosis ; each sex cell has one allele
what does fertilization do to diploid cells
fertilization brings the diploid cells back up to two copies or alleles for each gene
what is a pedigree
a chart that summarizes phenotypes and/or genotypes within a family over several generations
what is a dihybrid cross
if both parents are heterozygous for both traits
what are the sex chromosomes
in fruit flies and humans the males are XY and the females are XX and this means males only get one x chromosome with a short y chromosome that is not truly homologous to the x chromosome
are autosomal sex chromosome
no they are not they are all the other chromosomes
how often do x linked diseases show
these are expressed more often in males than in females
