Q: How does the Xist gene make a Barr body?
A: Euchromatin is defined as the active form of chromosomal DNA whereas heterochromatin is defined as…
Q: If nondisjunction occurs in a chromosome pair, what will be its effect on the gametes and the…
A: Nondisjunction occurs when homologous chromosomes or sister chromatids fail to divide properly…
Q: What is parental or noncrossover gametes?
A: Actual traverse during meiosis I is a typical occasion. The impact of this occasion is to improve…
Q: What is crossing over, when does it occur, and what is its significance
A: Genes located close together on the same chromosome are transmitted as a single unit to the daughter…
Q: For a couple, what is the significance of knowing chromosomal aberrations?
A: Chromosomes are thread-like structures present inside the nucleus of the cell. They are made up of…
Q: During crossing over, does the segments of DNA being exchanged between chomosomes contain the same…
A: Most organisms that endure sexual reproduction contain 2 varieties of cells in their body – haploid…
Q: During which phase of meiosis does ploidy reduction occur? Does ploidy reduction occur in mitosis?
A: Ploidy reduction happens during meiosis II in the process of cell division through meiosis.…
Q: How many chromosome duplications take place in Meiosis?
A: Meiosis: It is the process of cell division forming four daughter cells that contain half of the…
Q: How does crossing-over affect the genetic content of the haploid gametes?
A: Gametes are produced in organisms through the process of sexual reproduction. Sexual reproduction…
Q: What is the relationship between nondisjunction and aneuploidy?
A: A karyotype represent all chromosomes that are found in an organism. In human beings, there are 23…
Q: what is the benefit of crossing over?
A: REPRODUCTION:- It is the production of offspring from the parents. It is of two types:- 1)Asexual…
Q: Is a daughter cell haploid or diploid after the first meiotic division? How about after the second…
A: Meiosis is a type of cell division that produces haploid gametes and it is important because, during…
Q: Which is the type ofgamete produced by aheterozygous individual?What is the genotypicalproportion of…
A: Alleles are the two-contrasting form of genes. They are pairs of genes on a chromosome that…
Q: What is crossing over and how does it affect the outcome of meiosis?
A: Meiosis is a type of division in which daughter cells possess half the number of chromosomes of…
Q: What is a chromosomal island and how can one be identified asbeing of foreign origin?
A: The term chromosomal island is generally used in microbiology with regard to the bacteria. The…
Q: What are the products of crossing over?
A: The process in which parent cells divide and produce two or more daughter cells is referred to as…
Q: Which event occurs only during prophase I of the first meiotic division?
A: A parent cell splits into two or three daughter cells in the course of cell division. Normally, cell…
Q: What is a Barr body, and where is it found in a cell?
A: A chromosome is a long DNA molecule with part or the whole hereditary material of a creature. Most…
Q: What is sex linked inheritances and how to do crosses?
A: The chromosomes are threadlike structures inside the DNA that provide structural support and contain…
Q: How does crossing over “unlink” genes?
A: Crossing over is the exchange of genetic material that takes place in the germ cells. The pair of…
Q: Crossing-over is all of the following EXCEPT
A: The exchange of genetic material between non-sister chromatids of homologous chromosomes is called…
Q: Aneuploidy is the loss or gain of one or more______________?
A: Cells are the basic structural and functional unit of the organism. Cell division is the process in…
Q: What are linked genes? What is the difference between tightly-linked and loosely-linked genes?
A: Genes which get inherited In conjunction with other genes and are found on the same chromosome is…
Q: Why does nondisjunction in meiosis I results in a higher proportion of faulty gametes than…
A: Of all the chromosomal disorders, the most readily recognisable from a karyogram are chromosome…
Q: How are chain chromosomes formed and will the formation of this result to sterile or fertile…
A: Although seen rarely among vertebrates, chain chromosomes are a phenomenon that can be seen to…
Q: What happens When a gamete is fertilized by a standard haploid gamete ?
A: BASIC INFORMATION GAMETES These are basically the reproductive cells of the organisms. Sex cells…
Q: What is crossing over? Howis meiosis related to thisphenomenon?
A: Meiosis : A type of cell division in which parent cell give rise to 4 haploid (n) daughter cells.…
Q: Do the genes of the X and Ychromosomes determine onlysex characteristics?
A: The human cell contains 23 pairs of chromosomes. The first twenty three pairs of chromosomes are the…
Q: A woman who is homozygous for normal color vision mates with a colorblind male. they produce a…
A: Color blindness is an X-linked recessive genetic disorder. In this disease, the person has less…
Q: How does a chromosomal duplication occur?
A: When a part of chromosome is present in two copies or duplicated, it is known as duplication. This…
Q: What is chromosomal rearrangements?
A: “Chromosomes” are “thread-like structures” and is composed of “protein” and a “DNA molecule” which…
Q: A diploid organism has five pairs of chromosomes in each somatic cell. Assuming that no crossing…
A: When the DNA molecule is well organized and packaged into thread-like structures in the nucleus of…
Q: What are chromosomal islands? Why are theyconsidered to be of foreign origin?
A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…
Q: at what point in meiotic cell division would nondisjunction occur?
A: All living organisms are made up of cells. The cells are the basic structural and functional unit of…
Q: What is crossover? When does it happen? What are the consequences?
A: The cell cycle is the sequence of events that take place in the cell. The cell cycle has 4 main…
Q: Which are the three different types of meiosis that can take place, each of which produces a…
A: Meiosis is a type of cell division in which the daughter cells formed have half the ploidy level as…
Q: What is the cross between the progeny of F1 and the homozygous reccessive parent called? How is it…
A: Introduction Monohybrid cross deals with one character controlled by one pair of alleles such as…
Q: What is crossing over and where does it occur in meiosis? Why is crossing over important for…
A: When a mother cell divides into two or more daughter cells, a parent cell has undergone the process…
Q: What is the difference between polygeny and pleiotropy?
A: Biological inheritance, also called heredity, is the process by which different traits are passed on…
Q: In general what is thecause of the aneuploidies?
A: Aneuploid cells have an irregular chromosome count. Because each chromosome comprises hundreds of…
Q: How do we know if Nondisjunction occurs in meiosis one or two?
A: Meiosis is a type of cell division which generally occurs in germ cells or reproductive cells.…
Q: What is the importance of chromosomal crossover events during meiosis I? Explain in a detailed…
A: Meiosis is a kind of cell division that produces four haploid daughter cells, each having half the…
Q: what is Meiotic Nondisjunction?
A: Meiosis is also known as a double division that occurs in a diploid cell and gives rise to four…
Q: what event takes place during meiosis prophase (as opposed to mitosis prophase) that makes it…
A: Cell division is splitting phenomenon which comprises of splitting of parent cell and results in…
Q: What is the relationship between the severity of symptoms and the size of the chromosome involved in…
A: More the size of the chromosomes involved in the trisomy, more will be the severity of symptoms.…
Q: What is Nondisjunction? How is it linked to meiosis, mitosis and cancer?
A: Nondisjunction is the failure of homologous chromosomes or sister chromatids to isolate subsequently…
Q: What is a crossing over, and what is the purpose of it?
A: The cell cycle is the orderly series of events allowing a cell to grow and divide forming daughter…
What is crossing over, when does it occur and what is its importance?
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