Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 15.5, Problem 1CC
Summary Introduction
To write:
About the sex determination of an individual.
Introduction:
Sex chromosomes refer to a distinctive pair of chromosomes that are different in females and males and that determine the sex of individuals. Several sex determination mechanisms have been found in various animal species. In mammals, the mechanism involve is X-Y system which show the chromosomal differences between the sexes.
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Chapter 15 Solutions
Principles of Biology
Ch. 15.1 - Prob. 1CCCh. 15.1 - Why are the stamens removed from the purple...Ch. 15.1 - Prob. 3CCCh. 15.1 - Prob. 4CCCh. 15.1 - Prob. 5CCCh. 15.1 - Prob. 1TYKCh. 15.1 - Prob. 2TYKCh. 15.2 - Prob. 1BCCh. 15.2 - Prob. 2BCCh. 15.2 - Lets suppose that a cell is heterozygous for three...
Ch. 15.2 - Prob. 1TYKCh. 15.2 - Which phase of cellular division explains Mendel*s...Ch. 15.3 - Prob. 1CCCh. 15.3 - Prob. 2CCCh. 15.3 - Prob. 1TYKCh. 15.4 - Prob. 1CCCh. 15.4 - In pea plants, P is a dominant allele that confers...Ch. 15.4 - The effects of a gene may be pleiotropic because...Ch. 15.5 - Prob. 1CCCh. 15.5 - Prob. 1TYKCh. 15.5 - Prob. 2TYKCh. 15 - Experimental advantages of using pea plants...Ch. 15 - Which of the following phenomena cannot be deduced...Ch. 15 - Prob. 3TYCh. 15 - Prob. 4TYCh. 15 - Prob. 5TYCh. 15 - Prob. 6TYCh. 15 - Prob. 7TYCh. 15 - Prob. 8TYCh. 15 - A hypothetical flowering plant species produces...Ch. 15 - Prob. 10TYCh. 15 - Describe the difference between genotype and...Ch. 15 - When examining a human pedigree, what patterns do...Ch. 15 - Prob. 3CCQCh. 15 - Prob. 1CBQCh. 15 - Prob. 2CBQ
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- You are transported to a fantasy world where legendary creatures actually exist. In this world, a rhinoceros has 56 chromosomes and a horse has 54 chromosomes. When a female rhino mate with a male horse, a unicorn (!) is produced, but sadly it is usually sterile (cannot produce offspring). 5a. How many chromosomes does a unicorn have? 5b. Give one reason to explain why most unicorns are sterile.arrow_forwardIf a human gamete with an extra chromosome participates in fertilization with a gamete with a normal number of chromosomes, how many chromosomes will the zygote have? Explain your answer. (Remember, zygotes are diploid)arrow_forwardThe horse has a diploid set of 64 chromosomes, and a donkey has a diploid set of 62 chromosomes. Mules (viable but usually sterile) are produced when a male donkey is mated to a female horse. How many different chromosomes will a mule somatic (body) cell contain? Explain your answer.arrow_forward
- Normally you cant inherit both copies of a homologous chromosome from the same parent. Why? Assuming that no crossing over has occurred, how likely is it that one of your non-sex chromosomes is an exact copy of the same chromosome your maternal grandmother had? Explain your answer.arrow_forwardSally took her dog Chester to the vet for some routine blood work, and asked the vet how many chromosomes (chromatids) were in each somatic body cell of her dog. The vet replied "Seventy eight of course!". Sally knows that the vet is referring to the diploid number of chromosomes with the number 78,but what is the haploid number of Chester's cells? Question 3 options: 39 78 23 37arrow_forwardFrom this point on, meiosis is very similar (but not exactly similar) to what happened in mitosis. How many copies of each type of chromosome end up in the daughter cells of meiosis when it is complete?arrow_forward
- The normal chromosome number of human sperm is 23. If a person is born with a trisomic condition, how many chromosomes will the somatic cells of this individual have? 21 24 45 47 48arrow_forwardA meiotic-nondisjunction causes trisomy 8 in a newborn. If two of the three copies of chromosome 8 are identical, at what point during meiosis did nondisjunction take place? Explain how you arrived at this answer.arrow_forwardImagine you are a medical professional, and your patient is pregnant with a child whose karyotype has been determined. The unborn child's karyogram is shown below in the picture. Create the symbol for this result, and then speculate on the outcome of this pregnancy, based on what you know about the viability of human trisomies.arrow_forward
- A cell has four pairs of chromosomes. Assuming that crossing over does not occur, what is the probability that a gamete will contain all of the paternal chromosomes? If n equals the number of chromosomes in a set, which of the following expressions can be used to calculate the probability that a gamete will receive all of the paternal chromosomes: (1/2)n, (1/2)n–1, or n1/2?arrow_forwardmeiosis in a cell with three pairs of homologous chromosomes produces eight unique gametes (crossovers aside). Use the same technique to determine how many unique gametes can be produced by a cell that has four pairs of homologous chromosomes. A human female can release about 350 eggs during her reproductive years. What is the chance that she would generate the same gamete twice in her lifetime?arrow_forwardThe human contains 23 pairs of homologous chromosomes, all of which are indepently assorted. What do you think the chance would be that one of your gametes would contain either all of your mother's or all of your father's chromosomes?arrow_forward
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