To discuss:
The male determining gene on the Y chromosome; Protein encoded by that gene; Effect of that protein on embryonic development.
Introduction:
The sex chromosomes tend to be two types. X and Y chromosome. The Y chromosome is a male sex determining chromosome and it is usually smaller in size. The X chromosome is female sex determining chromosome and it is larger than the Y chromosome. During fertilization process the X sperm fuses with egg to give rise to a XX chromosome, which develop into the female individual from the resulting zygote. If Y sperm fuses with the egg, then it will be an XY pattern which gives rise to male individual development from the zygote.
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Chapter 27 Solutions
LSC (CONCORDIA UNIV ST PAUL) BIO 315/316: B&N DPF Connect with APR and Phils Online Access for Anatomy and Physiology: The Unity of Form and Function 180 Day Access ENTRP
- 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?arrow_forwardHow Sex-Specific DNA Methylation Is Responsible for Genomic Imprintingarrow_forwardWhat phase of mitotic interphase is missing from meiotic interkinesisarrow_forward
- What polygenic inheritance and pleiotropyimply about the relationship between acertain phenotype and its associated genes;examples of botharrow_forwardOogenesis in the female results in one functional gamete—the egg, or ovum. What other cells are produced? What is the significance of this rather wasteful type of gamete production—that is, production of a single functional gamete instead of four, as seen in males?arrow_forwardWhat distal to them are responsible for holding the homologous chromosomes together during pro-phase and metaphase of meiosis I.arrow_forward
- In humans, gametogenesis in both sexes relies on meiosis. However, spermatogenesis produces four gametes while oogenesis produces only one. Explain why this is so, including the specific structures or processes involved.arrow_forwardHow many chromosomes a female human cell will have after mitotic division.arrow_forwardA homozygous dominantarrow_forward
- Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning
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