can anyone help Study Case #6 Question:There are several ways that parthenogenetic offspring, with a mother but no father, can beproduced:(Scenario #1) A diploid primary oocyte can develop into a baby instead of dividing by meiosis.(Scenario #2) The two cells produced at the end of meiosis II (a haploid egg and a polar body)may fuse to produce a diploid cell that develops into a baby.(Scenario #3) The haploid egg produced by meiosis may undergo DNA replication to produce twoidentical sister chromatids joined at the centromere. The cell begins to divide by mitosis and thesister chromatids move apart to become separate chromosomes. Instead of completing mitosis,the sister chromatids remain, now as homologous chromosomes in a diploid cell that developsinto a baby.Answer the following questions (text and/or drawings with explanations are acceptable):A) Why does (Scenario #1) produce babies that are homozygous only at genes where themother is homozygous?B) Why does (Scenario #2) produce babies that are homozygous at some genes where themother is heterozygous?C) Why does (Scenario #3) produce babies that are fully homozygous at all genes?

Parthenogenesis is a form of reproduction in which an egg can develop into an embryo without being fertilized by a sperm. Several insect species including aphids, bees, and ants are known to reproduce by parthenogenesis. Some reptiles and fish are also capable of reproducing in this manner.1) Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. Crossing over takes place during meiosis. During this process, the paired chromosomes from each parent align so that similar DNA sequences from the paired chromosomes cross over one another. As meiosis does not occur in the diploid primary oocyte, no crossing over takes place. Hence, the babies produced are homozygous only at gene where the mother is homozygous. 2) In the second scenario, meiosis takes place, which indicates the occurrence of crossing over. So, as a result of crossing over, some babies may be homozygous at genes where the mother is heterozygous. 3) The haploid egg undergoes DNA replication producing two sister chromatids joined at the centromere. When the cell begins to divide, the sister chromatids remain as homologous chromosomes in a diploid cell instead of completing the process of mitosis. As the mitosis is not completed after the segregation of sister chromatids, the genes remained homologous, and hence, all the babies produced are fully homozygous.