Biology: The Unity and Diversity of Life (MindTap Course List)
Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 12, Problem 1DAA
Summary Introduction

To determine: The percentage of the mice that had the most abnormalities in their oocytes with no exposure to damaged caging.

Introduction: BPA is a synthetic chemical that imitates the female sex hormone (estrogen) that is found in the animals. Bisphenol A (BPA) is used in the manufacturing of different plastics including polycarbonate plastics such as dental sealants, baby bottles, and food and drink containers. Research studies show that these chemicals possess the capability to disrupt the meiotic division and then damage the reproductive function of the organism (experiments conducted in the mice oocytes).

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Drosophila melanogaster, the common fruit fly, has 4 chromosomes in each of its gametes. How many chromosomes are in each somatic cell?
somatic cells males a normal amount of one too many sex chromosomes excess females infertility death the germ line autosomes one too few Humans who have aneuploidy of the sex chromosomes are viable. A human who has the Klinefelter syndrome (XXY) has the normal number of and will produce the normal amount of proteins from gene on autosomes. A person who has Klinefelter syndrome (XXY) has X chromosomes, one of which will condense into a Barr body in somatic cells. Most X chromosome genes produce protein. The few genes in the PAR region of the X chromosome remain active and those genes produce XXY somatic cells, leading to skeletal abnormalities in with Klinefelter syndrome. protein in the In the Barr body is reactivated. The higher dose of X chromosome gene expression in the XXY male germ line leads to defective spermatogenesis and
Question : if our  society the women are often blamed for given brith to daughters .can you explain why this is not correct ?(or) justify the fact that in human beings , sex of the child is determined by father , not by mother .? Answer ; All human  being's  have 23 pairs of chromosome .Human males have 22 pairs at autosomes and coutain one or two types of sex chromosome  .they are either X And Y .on contrary, females have 22 pairs of autosomes and contain only the X sex chromosome .the Sex of an individual  is determined by the type of the male gametes  (X or Y) , which fuses with  the X chromosome  of  the female. Ic the fertilizing sperms is X , then the baby will be girl and if it is Y, then the baby will be boy .Hence , it is incorrect to blame a  women for the gender of the child.
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Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY