A heterozygous fruit fly with normal wings and a gray body (VvBb) is crossed with homozygous flies ...

A heterozygous fruit fly with normal wings and a gray body (VvBb) is crossed with homozygous flies with vestigial
  wings and black bodies (vvbb). This type of cross is known as a:
  a. monohybrid cross.
  b. dihybrid cross
  c. polytropic cross.
  d. true breeding cross.
  e. chromosomal cross

Question 2

The chromosome theory of inheritance, developed by Sutton and Boveri, provided an explanation for Mendels
  principle of segregation by proposing that:a.
   sister chromatids separate during mitosis.
  b. all genes are linked on a single chromosome.
  c. linked genes are inherited together.
  d. homologous chromosomes segregate during meiosis.
  e. homologous chromosomes segregate during mitosis