A developmental biologist wishing to understand cell specifi

A developmental biologist wishing to understand cell specification, removed a blastomere from an embryo that uses conditional specification and placed it in another embryo that was at the same stage of development: which of the following would you expect to happen? A. the donor embryo will have a hole in one of its organs due to the missing role. B. the recipient embryo would die C. the remaining cells of the donor embryo undergo regulative development D. the donor embryo would die E. the recipient embryo would have duplicate organs In an attempt to explore the role of bicoid protein in positional development of Drosophila melanogaster, a developmental biologist at syncytial university, transplanted bicoid protein from wild type Drosophila melano gaster eggs to the posterior end of bicoid deficient Drosophila melanogaster eggs. Which of the following statements is correct based on your understanding of the role of bicoid in development of the flies? A. the resulting embryos developed posterior structures at the posterior end B. the resulting embryos developed anterior structures at the posterior end C. the resulting embryos developed posterior structures in the anterior end D. the resulting embryos developed the mid-section structures at the posterior and E. development of posterior structures was inhibited

Solution

21. The correct answer is C, the blastomere removal will make the donor embryo to undergo regulative development thereby forming the structures which the original blastomere would have formed.

22. The answer is option B.

When embryos deficient in bicoid protein are injected then the point of injection develops the head structures because the bicoid proteins function for the anterior head formation.