Which of the following does not contribute to genetic variation in sexually reproducing species? Oa. random fertilization O b. independent assortment Oc cytokinesis O d. none of the answers are correct none of the answers are correct O e. crossing over

in a cell with gene for A/a allels and B/b alleles are on the same chromosomes what are the possible different kinds of gametes produces by meiosis? Assume one chromosome has A-B, and other homologous chromosome has a-b and no crossing over orccurs. (choose one answer only) 1. Ab 2. AB 3. AB,Ab,aB,ab 4. Ab,aB 5. ab 6. AB,ab 7. aB

What process is represented by the numbers 3 and 7 in the diagram below? * 4a 4b 3 5 2a 2b 9. 7 3 is mitosis and 7 is meiosis O 3 is meiosis and 7 is mitosis

. In a certain strain of turkeys, unfertilized eggs sometimes develop parthenogenetically to produce diploidoffspring. (Females have ZW and males have ZZ sexchromosomes. Assume that WW cells are inviable.)What distribution of sexes would you expect to seeamong the parthenogenetic offspring according toeach of the following models for how parthenogenesisoccurs?a. The eggs develop from oogonial cells that neverundergo meiosis.b. The eggs go all the way through meiosis and thenduplicate their chromosomes to become diploid.c. The eggs go through meiosis I, and the chromatidsseparate to create diploidy.d. The egg goes all the way through meiosis and thenfuses at random with one of its three polar bodies(this scenario assumes the first polar body goesthrough meiosis II).