Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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A human male named Phillip has an X chromosome that is
missing its Xic. Is this caused by a new mutation (one that occurred
during gametogenesis), or could this mutation have occurred in an
earlier generation and be found in the somatic cells of one of his
parents? Explain your answer. How would this mutation affect his
ability to produce viable offspring?
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- Carbon Copy (CC), the first cat produced from aclone, was created from an ovarian cell taken from hergenetic donor, Rainbow, a calico cat. The diploid nucleusfrom the cell was extracted and then injected into an enucleatedegg. The resulting zygote was then allowed to developin a petri dish, and the cloned embryo was implanted inthe uterus of a surrogate mother cat, who gave birth to CC.CC’s surrogate mother was a tabby (see the photo below).Geneticists were very interested in the outcome of cloninga calico cat because they were not certain if the cloned catwould have patches of orange and black, just orange, orjust black. Taking into account the Lyon hypothesis, explainthe basis of the uncertainty. Would you expect CC to appearidentical to Rainbow? Explain why or why not.arrow_forwardDuring embryonic development, what event causes one of the twoX chromosomes to be remain active, whereas the other one becomesan inactive X chromosome?arrow_forwardMost cells in a sexually reproducing organism have two sets of chromosomes. Explain this observation and describe its significance to meiosis.arrow_forward
- In fruit flies, sex is determined by the ratio of X chromosomes to autosomes. What would be the phenotype of a fly that is XXY with 4 sets of autosomes (AAAA)? Male Metafemale Metamale Intersexarrow_forwardHuman Somatic (non reproductive) cells have 46 chromosomes organized into 23 pairs. A human somatic cell goes into mieosis, how many chromosomes does each resultant daughter cell have?arrow_forwardA normal female is discovered with 45 chromosomes, one ofwhich exhibits a Robertsonian translocation containing most ofchromosomes 18 and 21. Discuss the possible outcomes in heroffspring when her husband contains a normal karyotype.arrow_forward
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