event les may Suunp may subsequently be fertilized by sperm with an extra set of sex chromosomes. As a result, this may lead to a dizygotic pregnancy of 1 boy (sex chromosome combination with only 1 X chromosome) and 1 girl (sex chromosome combination with X chromosomes only). Interpret how the described fertilization event may affect each of the resultant offspring in

event les may Suunp may subsequently be fertilized by sperm with an extra set of sex chromosomes. As a result, this may lead to a dizygotic pregnancy of 1 boy (sex chromosome combination with only 1 X chromosome) and 1 girl (sex chromosome combination with X chromosomes only). Interpret how the described fertilization event may affect each of the resultant offspring in

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

Chapter11: Meiosis: The Cellular Basis Of Sexual Reproduction

Section: Chapter Questions

Problem 8TYK: In the human sperm: a. there must be one chromosome of each type, except for the sexchromosomes,...

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Which of the following is not associated with sperm production? a. daughter cells identical to the parent cell b. variety in resulting cells c. chromosome number halved in resulting cells d. four daughter cells arising from one parent cell e. 23 chromosomes in the human sperm
1. How would a tubal ligation or vasectomy influence meiosis in individuals who elected to have one of these operations? 2. Synapsis of homologous chromosomes is perhaps the most important event in meiosis. What is it and what does it do?
3. An ultrasound of a pregnant woman detects a fetus and a similarly sized and shaped structure that has disorganized remnants of facial features at one end. Amniocentesis reveals that the fetus is 46,XX, but cells of the other structure are 47,XX,trisomy 2. No cases of trisomy 2 infants have ever been reported. However, individuals who are mosaics for trisomy 2 have a collection of defects, including a rotated and underdeveloped small intestine, a small head, a hole in the diaphragm, and seizures. a. How do the chromosomes of cells from the fetus and the other structure differ? b. What is the process that occurred during meiosis to yield the abnormal structure? c. Why are people with a complete extra chromosome 2 not seen, even though people with an extra chromosome 21 can live many years? d. List two factors that affect the type and severity of abnormalities in an individual who is an aneuploid mosaic
__1. How many sperms will be formed from 16 secondary spermatocytes? __2. If an organism’s somatic cell has 2n=8, what will be the chromosome number of its gametes (undergo meiosis I and II)?
1. How do humans maintain the normal number of chromosomes across generations?2. What is the relationship between a DNA molecule and a chromosome? 3. Create an artwork (illustration/drawing) that differentiates autosomes and sex chromosomes.4. Research on in vitro fertilization, discuss or identify the importance of in vitro fertilization.
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.
1. A nondisjunction is a rare event during meiotic division wherein the homologous chromosomes fail to separate. If nondisjunction occurs in chromosome pair, what will be its effect on the gametes and the offspring in relation to the alleles present in the chromosomes?
5.)Gametogenesis, or the formation of gametes, occurs when diploid germ cells undergo meiosis. In fruit flies (Drosophila melanogaster), diploid germ cells contain eight chromosomes. Which of the following correctly describes the number of chromosomes in the daughter cells produced during gametogenesis in fruit flies? The daughter cells each contain four chromosomes after meiosis I and four chromosomes after meiosis II. The daughter cells each contain eight chromosomes after meiosis I and eight chromosomes after meiosis II. The daughter cells each contain eight chromosomes after meiosis I and four chromosomes after meiosis II. The daughter cells each contain four chromosomes after meiosis I and two chromosomes after meiosis II.
__1. How many polar bodies will be produced by 32 primary oocytes considering that their meiosis II is completed?
__1. How many daughter cells will be produced if there are 20 mother cells which will undergo meiosis I and II?
17.Which among the following statement is NOT TRUE about the theory of inheritance? A. The paternal and maternal chromosomes assort randomly during meiosis. B. Genes are transmitted from parent to offspring via chromosomes. C. Gametes contain either a maternal set of chromosomes only or a paternal set of chromosomes only. D. An offspring receives one allele from the first parent and another allele from the other parent, giving the offspring two alleles.
1) A variety of abnormalities in the numbers of sex chromosomes exist because of nondisjunction during gametogenesis. Discuss the signs and problems associated with conditions such as Klinefelter and Turner syndromes.