1. Refers to the phase which it ensure that important cell-cycle events occur in the correct sequence A. karyokinesis B. Cell stopover C. synapsis D. checkpoint 2. Refers to the functional gametes of human that is homogametic A. oogenesis B. spermatogenesis C. Sperm D. Egg
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- Which of the following cells canundergo meiosis?a. the diploid body cells of an animalb. haploid gametesc. germ cellsWhich of these is paired incorrectly?a. prometaphase—the kinetochores become attached tospindle fibersb. anaphase—daughter chromosomes migrate toward spindlepolesc. prophase—the nucleolus disappears and the nuclearenvelope disintegratesd. metaphase—the chromosomes are aligned in the metaphaseplatee. telophase—a resting phase between cell division cyclesA diploid cell has ________ the number of chromosomes as a haploid cell.a. one-fourthb. one-halfc. twiced. four times
- Cell differentiation occurs through _______________, whereas morphogenesis involves _______________. (a) pattern formation; cell determination (b) cell division; cell expansion (c) cell expansion; pattern formation (d) cell determination; cell division (e) cell determination; pattern formationA spermatogonial cell undergoes mitosis before entering the meiotic cell cycle en route to the production of sperm. However, during mitosis the cytoplasm fails to divide, and only one daughter cell is produced. A resultant sperm eventually fertilizes a normal ovum. What is the chromosomal complement of the embryo?Choose the best matching phrase in the right columnfor each of the terms in the left column.a. meiosis 1. X and Yb. gametes 2. chromosomes that do not differbetween the sexesc. karyotype 3. one of the two identical halvesof a replicated chromosomed. mitosis 4. microtubule organizing centersat the spindle polese. interphase 5. cells in the testes that undergomeiosisf. syncytium 6. division of the cytoplasmg. synapsis 7. haploid germ cells that uniteat fertilizationh. sex chromosomes 8. an animal cell containing morethan one nucleusi. cytokinesis 9. pairing of homologouschromosomesj. anaphase 10. one diploid cell gives rise to twodiploid cellsk. chromatid 11. the array of chromosomes in agiven celll. autosomes 12. the part of the cell cycle duringwhich the chromosomes are notvisiblem. centromere 13. one diploid cell gives rise to fourhaploid cellsn. centrosomes 14. cell produced by meiosis thatdoes not become a gameteo. polar body 15. the time during mitosis whensister chromatids…
- Women sometimes develop benign tumors calledovarian teratomas or dermoid cysts in their ovaries.Such a tumor begins when a primary oocyte escapesfrom its prophase I arrest and finishes meiosis Iwithin the ovary. (Normally meiosis I does not finish until the primary oocyte is expelled from theovary upon ovulation.) The secondary oocyte thendevelops as if it were an embryo. Development isdisorganized, however, and results in a tumorcontaining differentiated diploid tissues, includingteeth, hair, bone, muscle, and nerve. If a dermoidcyst forms in a woman whose genotype is Aa, whatare the possible genotypes of the cyst, assuming norecombination?In Meiosis, the Chromosomes ReplicateOnce but the Nucleus Divides Twice why?B- halues the : Meiosis A- is important in a sexual reproduction 8 - halves the numbeu of cheromosomes and cells C- is reoponsible for body growth and repair splits aytoplasm in two D- the follows mitosis and E -is the ass by which the body produes diploidalls
- What process controls cell numbers during development? O Necrosis O Necroptosis O Apoptosis O Ferroptosis None of the above1 3. Enzymes are important during the process of fertilization. What would be the anticipated consequences if the level of acrosin was low or non-existent in the acrosome? 5. The Sperm would not be able to break through the protective coat on the egg (zona pellucida). meaning the sperm are unable to fertilize anegg 4. The morula contributes to a layer that becomes the embryo and to cells that become the placenta. What are the names of these structures? Illustrate and label these layers/structures. What is the name of the outer cell layer of the blastocyst and what does it give rise to? Does this layer contribute to the development of the embryo? 6. Explain the origins of the blastocyst cavity and what purpose does it serve? 7. Describe implantation of a blastocyst using simple, labeled diagrams.a. What phase of meiosis is this cell undergoing? b. Identify the 3 things that are incorrect in terms of this cells structure and organization? c. Would this cell produce viable gametes? Why or why not.