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- 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…Your friend is pregnant with triplets. She thinks that itis equally likely that she will be the mother of 3 sons,3 daughters, 2 sons and 1 daughter, or 1 son and 2daughters. Is she correct? Explain. (Assume that eachof the triplets is from a separate fertilization, and thatboys and girls are equally likely.)A women is heterozygous, Aa, for classic albinism and this gene maps to chromosome 11, and is a carrier for haemophilia, an X-linked trait (H/h). Provide a diagram of chromosomes 11 and the sexchromosomes (show the alleles associated with albinism and haemophilia) in the cells involved with normal oogenesis for this female. Start with the oogonium and end with the mature ovum; you can ignore all polar bodies. Your diagrams should show the chromatids clearly and all cells must be labelled. Indicatethe total number of chromosomes and chromatids for each cell stage.
- I have assignment for meiosis flip book and I have to draw and label and explain what happens in all the stages like early prophase middle prophase and late prophase for every stage like anaphase, metaphase etcA boy with Klinefelter syndrome (47,XXY) is born to a motherwho is phenotypically normal and a father who has the X-linkedskin condition called anhidrotic ectodermal dysplasia. The mother’sskin is completely normal with no signs of the skin abnormality.In contrast, her son has patches of normal skin and patchesof abnormal skin. Question: Which parent contributed the abnormal gamete?Completely answer the following questions. WIll give upvote if complete. Instructions: Consider the case whereby during spermatogenesis secondary non-disjunction affected four chromosomes (1,4,8,18) of one daugther cell; and during oogenesis secondary non-disjuction affected three chromosomes (7,18,21) of two daughter cell. 1. Will there be normal diploid gametes of maternal lineage? A. Unknown B. Maybe C. No D. Yes 2. Will there be excess chromosomes in the gametes that will be formed of maternal lineage? A. Unknown B. Maybe C. No D. Yes 3. What is the percentage probability that a zygote resulting from the union will be normal? A. 12. 5% B. 25% C. 50% D. 100% 4. What percentage of the possible progeny will be expected to manifest quadruple monosomy? A. 6.25% B. 12.5% C. 50% D. 25%
- A human male named Phillip has an X chromosome that ismissing its Xic. Is this caused by a new mutation (one that occurredduring gametogenesis), or could this mutation have occurred in anearlier generation and be found in the somatic cells of one of hisparents? Explain your answer. How would this mutation affect hisability to produce viable offspring?Over a period of two years, a man in his early 20s receiveda series of intermittent chemotherapy and radiotherapytreatments for Hodgkin disease. During this therapy, heand his wife were unable to initiate a pregnancy. The man had aseries of his semen samples examined at a fertility clinic. The findings revealed that shortly after each treatment very few mature sperm were present, and abnormal chromosome numbers were often observed in developing spermatocytes. However, such chromosome abnormalities disappeared about 40 days after treatment, and normal sperm reappeared about 74 days posttreatment. How might a genetic counselor explain the time-related differences in sperm production and the appearance and subsequent disappearance of chromosomal abnormalities?If an embryo splits at the two-cell stage, each of the resulting identical twins will have its own placenta. If such a split occurs near the time of implantation, the identical twins may shale a placenta. By contrast, fraternal twins never share placenta. Explain this difference between the two types of twins.
- A 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?f chromosomal nondisjunction occurs during meiosis I, what proportionof zygotes formed from the resulting gametes would be aneuploid? (Assume the gametes from the otherparent are normal) a. 0% b. 25% c. 50% d. 75% e. 100%What is a three-parent baby? The procedure in creating one through vitro fertilizationand What problem does it solve?
