WHAT IF? A chicken has 78 chromosomes in its somaticcells. How many chromosomes did the chicken inheritfrom each parent? How many chromosomes are in eachof the chicken’s gametes? How many chromosomes willbe in each somatic cell of the chicken’s offspring?

WHAT IF? A chicken has 78 chromosomes in its somaticcells. How many chromosomes did the chicken inheritfrom each parent? How many chromosomes are in eachof the chicken’s gametes? How many chromosomes willbe in each somatic cell of the chicken’s offspring?

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Description: WHAT IF? A chicken has 78 chromosomes in its somaticcells. How many chromosomes did the chicken inheritfrom each parent? How many chromosomes are in eachof the chicken’s gametes? How many chromosomes willbe in each somatic cell of the chicken’s offsp

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter13: Genes, Chromosomes, And Human Genetics

Section: Chapter Questions

Problem 12TYK

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Similar questions

WHAT IF? After the synaptonemal complex disappears,how would any pair of homologous chromosomes beassociated if crossing over did not occur? What effectmight this have on gamete formation?
WHAT IF? If maternal and paternal chromatids havethe same two alleles for every gene, will crossing overlead to genetic variation?
MAKE CONNECTIONS Look at Figure 12.7 and imagine the twodaughter cells undergoing another round of mitosis, yielding four cells.Compare the number of chromosomes in each of those four cells, aftermitosis, with the number in each cell in Figure 13.8, after meiosis. Whatis it about the process of meiosis that accounts for this difference, eventhough meiosis also includes two cell divisions?
WHAT IF? Propose a possible reason that the firstnaturally occurring mutant fruit fly Morgan sawinvolved a gene on a sex chromosome and was foundin a male.
WHAT IF? What would the human life cycle be likeif we had alternation of generations? Assume that themulticellular diploid stage would be similar in form to anadult human.
WHAT IF? List all gametes thatcould be made by a pea plantheterozygous for seed color, seedshape, and pod shape (YyRrIi; seeTable 14.1). How large a Punnettsquare would you need to drawto predict the offspring of a selfpollination of this “trihybrid”?
WHAT IF? Males afflicted with Kartagener’s syndromeare sterile because of immotile sperm, and they tend tosuffer from lung infections. This disorder has a geneticbasis. Suggest what the underlying defect might be.
3. Each cell in the human body contains exactly the same genome, and yet a human beingat maturity is a complex organism with trillions of cells that belong to different typesand perform different functions. Explain. 4. In humans, what are the random and non-random events in sexual reproduction (postmeiosis) that ultimately determine the genetic makeup of the offspring? How will this information guide you in the future, in the case you already engage in the reproductiveprocess to produce offspring? 5. Hypothetical situation/ analogy: You woke up one day having the sexual life cycle of a plant. Describe and briefly explain how this would affect your ability to find a mate and reproduce, as compared to having the sexual life cycle of a human. PLEASE ANSWER THIS WITH COMPLETE DETAILS FOR A THUMBS UP
WHAT IF? If the parental (P generation) flies had been true-breedingfor gray body with vestigial wings and black body with normal wings, whichphenotypic class(es) would be largest among the testcross offspring?
MAKE CONNECTIONS The ABO blood type locus hasbeen mapped on chromosome 9. A father who has typeAB blood and a mother who has type O blood have achild with trisomy 9 and type A blood. Using this information, can you tell in which parent the nondisjunctionoccurred? Explain your answer. (See Figures 14.11and 15.13.)
Task: Show your work/explain your reasoning as much as possible. If a certain species has a DNA content of 12 picograms in each diploid cell's nucleus when the cell in in G1 of the cell cycle, what would be the expected DNA content (in picograms) of a triploid cell (from the same species) in mitotic prophase? Consider ploidy changes and/or chromosome form changes, if applicable, when explaining your reasoning.
6. Consider your btoehr and your son. a. If you are female, will your brother and your son have essentially identically Y chromosomes? Explain your answer. b. If you are male, will your brother and your son have essentially identical Y chromosomes? Explan your answer.