lecture 7: mendelian postulates

Question 1

independent alignment

Answer 1

each pair of chromosomes sorts maternal and paternal homologs into daughter cells independently of the other pairs

Question 2

mendels first postulate

Answer 2

genetic characters are controlled by unit factors existing in pairs in individual organisms

Question 3

mendels second postulate

Answer 3

if the two alleles at a locus differ, then one (dominant) determines the organism’s appearance, and the other (recessive) has no noticeable effect on appearance

Question 4

mendel’s third postulate

Answer 4

the two alleles for a heritable character separate during gamete formation and end up in different gametes (law of segregation)

Question 5

law of segregation

Answer 5

2 alleles of each gene are packaged into separate gametes
* 3:1 ratio (phenotypic)

Question 6

mendel’s 4th postulate (independent assortment)

Answer 6

each pair of alleles segregates indepently of any other pair during gamete formation