A person with cancer walks into the classroom.  As a biology class, we ask if we can examine some of the cancerous cells and find that many of these cancerous cells have an extra chromosome 10 (trisomy) leading to more cyclin for forming the MPF being made, leading to uncontrollable cell division (i.e. tumor and progression to cancer).  What would cause extra chromosomes in cells (be it somatic or gametic cells)?   Select one: a. None of these choices are linked to how sister chromatids separate and would lead to extra chromosomes in daughter cells of cell division. b. APC not functioning correctly to add ubiquitin to the cohesins, thus sister chromatids do not split correctly during cell division c. MPF itself would cause more chromosome replication d. APC is overly functioning adding cohesins to the sister chromatids

Q: You are looking at a spread of cells in some unknown stage of cell division, and you discover that…

A: Cells are the biological, structural and functional unit of an organism. Cell has a nucleus. Nucleus…

Q: Why are the two cells produced by the cell cycle genetically identical?

A: The cell is the basic unit of life. The tissue is a group of cells that perform a specific function.…

Q: Why do you think that the chromosomes condense before mitosis?

A: The indirect process of cell division by which the somatic cell divides once to produce two daughter…

Q: If a rabbit has 22 chromosomes in each of its body cells, how many chromosomes will be in each…

A: Mitosis is a process where a single cell divides into two identical daughter cells. The major…

Q: Which statement is true about a person's chromosomes? a) They are arranged in homologous groups of…

A: In humans, there are 23 pairs of chromosome in a cell, in which 22 pairs are autosome and 1 pair of…

Q: different processes that affect the structure of the chromosomes

A: Chromosomal mutations includes the structural mutations that occurs as a result of the alterations…

Q: A son and his mother both have an inherited disorder that affects the nervous system. How would you…

A: Any abnormality in the nervous system structure and function that can be passed from one generation…

Q: The chromatids remain attached at their centromeres until?

A: DNA which carries the genetic information of the entire organism is long double stranded, which…

Q: How many types of histone proteins are present in eukaryotic chromatin? 3

A: In the nucleus of eukaryotic cells, histones are highly basic proteins with a lot of lysine and…

Q: In which phases of the cell cycle would you expect double-strand break repair and nonhomologous end…

A: The cell cycle is a process in which the size of the cell increases, the DNA copies, and prepare to…

Q: When studying living cells in a laboratory, researchers sometimesuse drugs as a way to make cells…

A: Introduction  Almost all types of cells with some exceptions undergo cell division in order to…

Q: List 8 different processes that affect the structure of the chromosomes. Explain how each process…

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Q: What type of chromosomal rearrangement occurs o Breakage of two homologous chromosomes or sister…

A: A chromosomal rearrangement is a type of chromosome abnormality involving a change in the structure…

Q: Why is it difficult to observe individual chromosomes during interphase?

A: Chromosomes are the genetic material that is formed when DNA is wrapped around the histone proteins.…

Q: What difference exists between the compaction of chromosomes during metaphase versus interphase?…

A: Chromosomal condensation: In the case of a eukaryotic chromosome, there are 3 levels of chromatin…

Q: What are sister chromatids? What is the process that forms two sister chromatids from a single…

A: DNA is the store house of genetic information. This genetic information is decoded through the…

Q: Most forms of cancer are caused by environmental agents that produce mutations in somatic cells. Is…

A: Environmental factors have been known to trigger a lot of the mutations which develop into cancerous…

Q: A human skin cell has 46 chromosomes. After that skin cell goes through mitosis, how many…

A: Mitosis is the cell division process which involves division of a parent cell into two similar…

Q: What are homologous chromosomes? a. The two halves of a replicated chromosome b. Two identical…

A: Introduction  A chromosome is consisted of two arms known as chromatids. These arms are denoted as…

Q: A duplicated chromosome has how many chromatids?

A: A duplicated chromosome has two chromatids . Chromatid gets separated during cell division .…

Q: Edwards Syndrome is a genetic condition in which a person has three copies of chromosome 18. This…

A: Ans. Edward syndromes (which are referred to as trisomy 18), are a syndrome of chromosome defects…

Q: A chromosome consists of two sister chromatids. Does the genetic information on the two sister…

A: The chromosomes are thread-like structure situated inside the nucleus of plant and animal cells.…

Q: Mitotic nondisjunction can occur, particularly in tumor cells. Assume a single nondisjunction event…

A: The failure to separate homologous chromosomes or chromatids during cell division (mitosis or…

Q: a. Assuming that no cells die, how many cells will there be in one week? b. Assuming that the…

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Q: Specialized cells such as neurons and red blood cells lose their ability to replicate when they are…

A: Cell cycle consists of two phases such as interphase and M-phase. Interphase consists of G1, S, and…

Q: 1 2 3 4 Here is a replication fork during S phase of the cell cycle. DNA strands are labeled 1-4.…

A: The DNA is a double stranded molecule which unwinds during replication. During replication one…

Q: it is a region of condensed pinched chromosomes?

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Q: What difference exists between the compaction of chromosomes during metaphase and interphase?

A: The cell cycle starts with long interphase followed by short mitotic phase. Interphase prepares cell…

Q: When chromosomes improperly separate it is called what? What type of condition could this cause?

A: Introduction - Chromosomes are thread-like structures within the nucleus that securely wrap DNA.…

Q: Single base pair mutations at which of the following sites would severely disrupt the segregation of…

A: Option D

Q: At what point duplicated chromosomes are joined?

A: Chromosomes are present inside the cell nucleus and made up of DNA (Deoxyribonucleic acid) molecules…

Q: Draw and label G1 and G2 stages of interphase and each stage of mitosis (in order) for a cell that…

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Q: The chromosomal region where sister chromatids are attached to each other is called the

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Q: Does resulting daughter cells in mitosis and meiosis will have identical features with their parent…

A: Answer 1- Meiosis is the process through which daughter cells are formed in sexually reproducing…

Q: Define the terms mutation, autosomes, and sex chromosomes.

A: Introduction :- A mutation is a change in a gene's structure, which is how inheritance works.…

Q: Each Chromosome Is Composed of a Single Long Molecule of ___________?

A: The chromosome is a DNA molecule that consists of hereditary information. The DNA is packed with…

Q: A crayfish strain became triploid while kept in a pet store. Pet owners released these crayfish into…

A: The order of cell cycle phase is G1→S→M  In G 1 phase, the cell synthesizes takes place and In S…

Q: What is the nuclear division that generates egg and sperm cells containing half the number of…

A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…

Q: Why is it important for DNA to be duplicated before mitosis

A: All the cells undergo differentiation and regeneration in order to grow and develop into tissues…

Q: Why is it important for a chromosome to be copied before mitosis?

A: Mitosis is a process of cell division in somatic cells. In this cell division, cells divide into two…

Q: How many DNA molecules are in a mitotic chromosome?How many strands of DNA nucleotides are in a…

A: DNA is deoxyribonucleic acid which contains nitrogenous base pairs, deoxyribose sugar, and phosphate…

Q: Why are changes in chromosome number almost always more severe than changes in chromosome structure?

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Q: With regard to thickness and length, what do you think chromosomes would look like if you…

A: Introduction  Cytology refers to the study of cell such as cell morphology, physiology etc. As we…

Q: Which cells in the human body undergo mitosis and do you think these cells are genetically identical…

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Q: Suppose you have a way of measuring the amount of DNA in a single cell during the cell cycle. You…

A: The life cycle of an eukaryotic cell is generally divided into four main stages - G1, S, G2 and…

Q: "A deletion of a portion of a chromosome need not be very great before the effects become severe".…

A: The genetic material of a cell is a nucleic acid. Most of the organism has DNA as the genetic…

Q: With regard to the process of mitosis, which of the following pairs is NOT matched correctly?

A: Introduction :- Mitosis is a process where a single cell divides into two identical daughter cells.…