SEELEY'S ANATOMY+PHYSIOLOGY
12th Edition
ISBN: 9781260172195
Author: VanPutte
Publisher: RENT MCG
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Chapter 29, Problem 1CT
Summary Introduction
To analyze:
The failures in fertilization leading to triploidy.
Introduction:
A genetic disorder is an alteration in the genetic composition of the individual for one or more genes that is manifested in the form of altered protein sequence for that particular trait. The genetic disorder is
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meiosis
mitosis and meiosis
mitosis
1. involves two successive nuclear and cell divisions
2. yields haploid daughter cells
3. results in production of four genetically different daughter cells
4. involves chromosome movement and distribution to daughter cells
5. preceded by replication of chromosomes during interphase
6. results in the production of gametes
7. involves pairing of homologous chromosomes and crossing-over
8. results in the production of two genetically identical daughter cells
Meiosis
The process of meiosis
Meiosis is a special type of cell
division necessary for the production
of sex cells (gametes) for the
purpose of sexual reproduction.
2N cell (diploid). N is
the haploid number of
chromosomes. Each
chromosome is replicated.
DNA replication precedes meiosis.
If genetic mistakes (mutations)
occur here, they will be passed on
(inherited by the offspring).
Crossing over
has occurred.
Meiosis involves a single
chromosomal duplication followed
by two successive nuclear divisions,
and it halves the diploid chromosome
number.
Homologous
chromosomes pair up.
The pairs are separated.
An overview of meiosis is shown on
the right. Meiosis occurs in the sex
organs of plants and animals.
An intermediate
cell forms with a
replicated copy of
each chromosome.
Meiosis produces variation
During meiosis, a process called
crossing over may occur when
homologous chromosomes may
exchange genes. This further adds to
the variation in the gametes.
Chromatid
The chromosomes
line…
Prophase I of meiosis is different from prophase in mitosis because
The homologous chromosomes pair up and crossing over occurs in meiosis not
mitosis.
The nuclear envelopes do not disappear in meiosis as it does in mitosis.
DNA replication occurs and the chromosomes condense in meiosis, but not in
mitosis.
OHomologous chromosomes are pulled apart in mitosis, but not in meiosis.
Chapter 29 Solutions
SEELEY'S ANATOMY+PHYSIOLOGY
Ch. 29.1 - Describe the three parts of the prenatal period,...Ch. 29.1 - Distinguish between clinical age and postovulatory...Ch. 29.1 - Prob. 3AYPCh. 29.1 - Prob. 4AYPCh. 29.1 - Prob. 5AYPCh. 29.1 - What events occur during the first week after...Ch. 29.1 - Prob. 7AYPCh. 29.1 - Explain the process of implantation and the...Ch. 29.1 - Prob. 9AYPCh. 29.1 - Prob. 10AYP
Ch. 29.1 - Prob. 11AYPCh. 29.1 - Prob. 12AYPCh. 29.1 - Prob. 13AYPCh. 29.1 - Prob. 14AYPCh. 29.1 - Describe the process involved in forming the face....Ch. 29.1 - Describe the formation of the following major...Ch. 29.1 - Explain the formation of the following endocrine...Ch. 29.1 - Prob. 18AYPCh. 29.1 - Prob. 19AYPCh. 29.1 - Prob. 20AYPCh. 29.1 - Prob. 21AYPCh. 29.1 - Prob. 22AYPCh. 29.2 - Prob. 23AYPCh. 29.2 - Describe the hormonal changes that take place...Ch. 29.3 - What changes occur in the newborn's cardiovascular...Ch. 29.3 - Prob. 26AYPCh. 29.3 - What does the score measure?Ch. 29.3 - What are congenital disorders? What are some...Ch. 29.3 - Prob. 29AYPCh. 29.4 - Which hormones ore involved in preparing the...Ch. 29.4 - Describe the events of milk production and milk...Ch. 29.4 - Prob. 32AYPCh. 29.5 - Prob. 33AYPCh. 29.6 - Prob. 34AYPCh. 29.6 - Prob. 35AYPCh. 29.6 - Prob. 36AYPCh. 29.6 - Prob. 37AYPCh. 29.6 - Prob. 38AYPCh. 29.6 - What role does genetics play in aging?Ch. 29.6 - Prob. 40AYPCh. 29.7 - What is genetics?Ch. 29.7 - Prob. 42AYPCh. 29.7 - What are alleles? If tall (T) plants are dominant...Ch. 29.7 - Prob. 44AYPCh. 29.7 - What are the number and type of chromosomes in the...Ch. 29.7 - Prob. 46AYPCh. 29.7 - Prob. 47AYPCh. 29.7 - Distinguish among complete om nonce, Incomplete...Ch. 29.7 - Prob. 49AYPCh. 29.7 - How are sex-linked traits inherited? Give on...Ch. 29.7 - What is meiosis? How does it differ from mitosis?...Ch. 29.7 - Prob. 52AYPCh. 29.7 - Prob. 53AYPCh. 29.7 - What causes the genetic disorder Down syndrome?Ch. 29 - Prob. 1RACCh. 29 - Given these structure: (1) blastocyst (2) morula...Ch. 29 - Prob. 3RACCh. 29 - Prob. 4RACCh. 29 - Prob. 5RACCh. 29 - Prob. 6RACCh. 29 - Prob. 7RACCh. 29 - Prob. 8RACCh. 29 - Prob. 9RACCh. 29 - Prob. 10RACCh. 29 - Prob. 11RACCh. 29 - Prob. 12RACCh. 29 - Prob. 13RACCh. 29 - Prob. 14RACCh. 29 - Which hormones cause differentiation of sex organs...Ch. 29 - Prob. 16RACCh. 29 - Prob. 17RACCh. 29 - Prob. 18RACCh. 29 - Prob. 19RACCh. 29 - Prob. 20RACCh. 29 - Prob. 21RACCh. 29 - Which of these terms is correctly matched with its...Ch. 29 - Prob. 23RACCh. 29 - Prob. 24RACCh. 29 - Prob. 25RACCh. 29 - Prob. 1CTCh. 29 - A physician tells a woman that she is pregnant and...Ch. 29 - Prob. 3CTCh. 29 - Prob. 4CTCh. 29 - Prob. 5CTCh. 29 - Prob. 6CTCh. 29 - Prob. 7CTCh. 29 - Prob. 8CTCh. 29 - Prob. 9CTCh. 29 - Prob. 10CT
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- A cell (2n = 4) has undergone cell division. Daughter cells have the following chromosome content. Has this cell undergone mitosis, meiosis I, or meiosis II?arrow_forwardPhases of meiosis Prophase I DNA coils tightly to form visible chromosomes which appear rod-shaped. Each chromosome is made up of two strands of DNA. One strand of a double-stranded chromosome is known as a chromatid. The sister chromatids are held together by a region called the centromere. Nuclear membrane dissolves. In animal cells, a pair of centrioles (not visible on these slides) separate and with their newly formed asters (visible) move to each pole. Homologous chromosomes pair up. These pairs are called tetrads because there are two chromosomes, but four DNA molecules. Crossing-over occurs.arrow_forwardWhat is crossing over? The final stage of meiosis When two sister chromatids exchange genetic information When two homologous chromosomes transfer genetic information in prophase I When two homologous chromosomes choose the Dark Sidearrow_forward
- Meiosis and germ cell formation in cell with four choromossomes can you see how chromosome segrate when germ cell are formed?arrow_forwardMEIOSIS COMPUTER SIMULATION PART A. Google: McGraw Hill Animation How Meiosis Works. Link here: https://www.youtube.com/watch?y=E6HF2otWE8k 1. Meiosis results in the formation of cells and cells. 2. Where are the cells that undergo mitosis found in males? in females? 3. Are the germ line cells that undergo meiosis haploid (n) or diploid (2n)? 4. Are the cells that are produced at the end of meiosis haploid or diploid? 5. Is the offspring formed from the fusion of the egg and sperm cell haploid or diploid? 6. During which phase of the cell cycle does DNA replication occur? 7. Meiosis consists of how many divisions? 8. List 2 important events that occur in Prophase I. 1) 2) 9. What happens during crossing over?, 10. After crossing over occurs, are the sister chromatids identical to one another? 11. What happens to the homologous chromosomes in Metaphase 1? 12. Draw a diagram of Metaphase I. Label the homologous chromosomes, centromere, spindle fibres, and centrioles 13. Name the process…arrow_forwardMeiosis: Sequence of Stages Number the stages of meiosis from 1 to 8 to show their correct chronological sequence. [Choose] [Choose] Prophase I Prophase II Metaphase I libraries Anaphase I Telophase I Telophase II Anaphase II Metaphase II nstructional urvey 3. 4 [Choose ] [Choose ) 6 [Choose] 7. [Choose ] 8. [Choose] > >arrow_forward
- Which of the statements is FALSE? Somatic cells are diploid in diploid organisms. Gametes are produced from meiosis by germline cells. Somatic cells are capable of both mitosis and meiosis. Somatic cells and gametes from the same organism have different chromosomal complements.arrow_forwardA sperm cell from the fruit fly Drosophila melanogaster contains four chromosomes. How many chromosomes would be present in a spermatogonial cell about to enter meiosis? How many chromatids would be present in a spermatogo- nial cell at metaphase I of meiosis? How many would be present at metaphase II?arrow_forward. Four of the following events are part of both meiosis andmitosis, but only one is meiotic. Which one? (1) Chromatidformation, (2) spindle formation, (3) chromosome condensation, (4) chromosome movement to poles, (5)synapsis.arrow_forward
- Meiosis ensures the even distribution of chromosomes to the daughter cells. Why does meiosis can result in uneven distribution of chromosomes to the daughter cells?arrow_forwardMeiosis DrawingIn this assignment you will track and draw the chromosomes of a diploid organism through all the stages of meiosis. Make sure you label the alleles for genes on the chromosomes the whole way through - every chromatid should have labeled alleles. For meiosis, both crossing over and independent assortment can occur. For the purpose of this exercise, assume that there is a single crossover event on the long chromosome between the A and D genes. Only show crossing over after its fully occured. There are no crossover events on the short chromosome. Regarding independent assortment, there are two possible outcomes in meiosis if there are two homologous pairs of chromsomes. Include both independent assortment possibilities - one on the left side and one on the right. Fill in the possible gamete genotypes for each outcome. If you do this correctly you should end up with 8 different types of gametes.arrow_forwardMeiosis DrawingIn this assignment you will track and draw the chromosomes of a diploid organism through all the stages of meiosis. Make sure you label the alleles for genes on the chromosomes the whole way through - every chromatid should have labeled alleles. For meiosis, both crossing over and independent assortment can occur. For the purpose of this exercise, assume that there is a single crossover event on the long chromosome between the A and D genes. Only show crossing over after its fully occured. There are no crossover events on the short chromosome. Regarding independent assortment, there are two possible outcomes in meiosis if there are two homologous pairs of chromsomes. Include both independent assortment possibilities - one on the left side and one on the right. Fill in the possible gamete genotypes for each outcome. If you do this correctly you should end up with 8 different types of gametes. Image attached for genotypes and alleles. Give me a full explaination of each of…arrow_forward
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