13. Cl eavage of the zygote in a plane that does not divide gray crescent follow
ID: 147651 • Letter: 1
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13. Cl eavage of the zygote in a plane that does not divide gray crescent followed by separation of the blastomeres results in: a. both cells will develop into a ball of undifferentiated cells b. complete development of the two embryos c. death of the embryos d. both cells will develop only into a gastrula e. cell containing gray crescent will follow complete development 14-15 Match the term with it description: a. heterotopic b. heterochronic 14. Transplantation in which embryonic part is transplanted into the same place from which it was taken but into a recipient of a different age is 15. Transplantation in which the removed part of a donor is transplanted into a different place of recipient of the same age is 16-19. Explain the term: Genome b. Genotype c. Loss-of-function allele d.Gain-of function allele 16. Gene becomes active at a time when, or in a place where, it is normally dormant 17. Alteration of a gene leaves some of its function intact 18. Genetic makeup of an organism 19. Assembly of genes in a DNA of an organism 20. Mutation produced in the maternal homeotic gene of the Drosophila larvae resulting in larvae with no head or thorax is a result of a gene named a. Ultrabithorax b. Bicoid c. Antennapedia d. uvabc e. ras Name the biologist who is credited with the formulation of the statement: Omis cellula e cellula a. Matthias Schleiden 21. b. Theodor Schwann c.Rudolf Albert Koelliker d. Oskar Herwig e. Rudolf Virchov a. nuclear envelope b. microtubules c. centriole d. lamins e. nuclear pores 23. Phospholipids are synthesized on/in 22. Chromosomes are in the nucleus attached to a. Rough endoplasmic reticulum b. Golgi apparatus c. nucleus d. primary lysosomes smooth endoplasmic reticulum e. a. actin b. keratin c. tubulin d. lamin e. basal body 24. Protein composing microfilaments 25. Protein composing intermediary filaments 26. Protein composing microtubules 24 26. Match the term with it description:Explanation / Answer
Answer 13: Option E is correct. Cell containing gray crescent will follow complete development.
Gray crescent contains information essential for development and function as organiser.
Answer 14: This is a Heterochronic type of transplantation. Heterochronic ismeans for the youthful modifications of stem cell niches.
Answer 15: This type of transplantation is heterotopic. The term heterotopia in medicine is used for the presence of a particular tissue not at its physiological site, but it co-existing with original tissue in its correct anatomical position.
Answer 16: This is Gain of function of allele.
In Gain of function by mutation a gene might gain a new activity.
Answer 17: This is a case of loss of function allele. In loss of function mutation might cause complete loss of its activity.
Answer 18: It is a genome.
Answer 19: Assembly of genes in a DNA of an organism is genotype.
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