Assume that meiotic nondisjunction event causes trisomy 8 in a newborn. If two of the three copies of chromosome 8 are absolutely identical, at what point during meiosis did the nondisjunction event take place?

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: For each of the following chromosome complements, what is the phenotypic sex of a person who has a.…

A: Hi! Since you have posted a question with multiple sub-parts, we will solve the first three…

Q: What is something that occurs in prophase 1 of meiosis but not mitosis? How does this affect the end…

A: Crossing over between homologous chromosomes occurs in prophase 1 of meiosis  but not mitosis During…

Q: If the original parental cell had 12 pairs of homologous chromosomes, how many chromosomes would be…

A: Numerous physiological operations happen simultaneously in a biological cell. The sequential…

Q: What is the probability that, in an organism with a haploid number of 10, a sperm will be formed…

A: Meiosis is a type of cell division where four gametes or daughter cells are produced as a result of…

Q: In a cell that has just begun the process of meiosis, as shown, what is the probability that a…

A: Meiosis It is defined as the cell division in which four haploid cells are generated from a single…

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: In which meiotic division does the separation of the homologous occur? What are the ploidies of the…

A: Meiosis is a mode of cell division. In this one cell divides to form 4 cells.

Q: If a dog cell (2n = 78) enters meiosis, how many chromosomes will be present in each daughter cell…

A: In Meiosis process , two divisions are involved that are Meiosis 1 and Meiosis 2.

Q: A woman with an abnormally long chromosome 13 (and a normalhomolog of chromosome 13) has children…

A: Since this is a disclaimer part with multiple questions, we will answer the first question alone…

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: Given the end results of the two types of division, why is it necessary for homologs to pair during…

A: Cell cycle is a series of changes that occurs in a newly divided cell through which it duplicates…

Q: Define the Protein structure that forms between the homologous chromosomes of prophase I of meiosis…

A: The synaptonemal complex (SC) is a protein structure that forms between homologous chromosomes (two…

Q: Two phenotypically normal parents produce a phenotypicallyabnormal child in which chromosome 5 is…

A: The thread-like structure present inside the nucleus is called a chromosome. The chromosome is…

Q: If nondisjunction occurs in humans for one pair of homologous chromosomes during meiosis I. The…

A: If nondisjunction occurs in humans for one pair of homologous chromosomes during meiosis I, then-…

Q: When do homologous chromosomes pair?  Select all that apply.    A.) During meiosis I   B.) During…

A: Homologous chromosomes refer to a pair of chromosomes having the same gene sequences, each derived…

Q: A meiotic-nondisjunction causes trisomy 8 in a newborn.  If two of the three copies of chromosome 8…

A: When the homologous chromosomes fail to separate during the meiosis I stage, this will result in…

Q: An organism has a diploid number of 16 in a primary oocyte. (a) How many tetrads are present in the…

A: Meiosis causes a reduction in chromosome number by half. It involves the recombination and pairing…

Q: If a muscle cell of a typical organism has 32 chromosomes, how many chromosomes will be in a gamete…

A: Muscle cells are also called as myocytes. These muscle cells are made up of muscle tissue. Muscle…

Q: If a diploid cell entering meiosis has 12 chromosome pairs, what is the number of possible…

A: Meiosis is a process of cell division, where cell divides twice to produce four daughter cells which…

Q: Assume that the diploid number of a certain species is four chromosomes, two large and two small…

A: The metaphase phase is the third phase of mitosis cell division which involves separation of…

Q: In which parent and during which meiotic division did non-disjunction occur? If there is more than…

A:

Q: If an organism has a haploid number of three, how many tetrad structures will align on the…

A: If an organism has a haploid number of three, how many tetrad structures will align on the…

Q: Give the chromosome number for the following:  1. 2n=4 treated with colchicine to produce an…

A: Every organisms have different chromosomes number. In human chromosome number is 46 , it is varies…

Q: What can be concluded about the severity of nondisjunction that occurs in meiosis I as opposed to…

A: Nondisjunction is the condition where the sister chromosomes fail to separate properly during cell…

Q: In what phase of meiosis is chromosome recombination most common?

A: Introduction :- Meiosis is a process in which a single cell divides twice to produce four cells with…

Q: Show via a diagram how the product(s) of a meiotic (either I or II) nondisjunction involving the X…

A: Kilnefelter's Syndrome:  Klinefelter's syndrome is a genetic disorder in which a boy is born with an…

Q: Considering an organism with three pairs of homologous chromosomes, how many different kinds of…

A: Answer : Since there are 3 pairs of homologous chromosomes, therefore  2N = 6 N = 3  to Calculate…

Q: In meiosis, each centromere has a spindle fiber attached only to one side. In mitosis, each…

A: Meiosis: Reductional division  2n (diploid) => meiosis => n (haploid) Mitosis: Equational…

Q: An individual heterozygous for a reciprocal translocation possesses the following chromosomes: A B •…

A: In a reciprocal translocation, two broken pieces are joined together which are non-homologous to…

Q: If two loci are 10 cM apart, what proportion of the cells in prophase of the first meiotic division…

A: * Given that two loci are 10cM apart (centimorgan) *Have to calculate the proportion of cells in…

Q: In which meiotic division does the separation of identical chromatids occur? After the end of this…

A: Meiosis occurs in two steps known as meiosis-I and meiosis-II. Meiosis-I is the reduction division…

Q: Given the diploid chromosome number highlighted above, what is the haploid chromosome number?

A: Cell division is the process of division of cell which occurs by two process - Mitosis Meiosis…

Q: In a diploid cell for which 2n = 20, how many chromosomes will be present in daughter cells after…

A: Cell division forms a significant part of the cell cycle. During cell division, the parental cell…

Q: Non-disjunction of chromosome 21 during meiosis one followed by fertilization can result in all of…

A: An zygote with nondisjunction has 3 duplicates of chromosome 21 rather than the usual two. A pair of…

Q: At the end of S phase, each chromosome has replicated to produce two complete copies that are joined…

A: The number of chromatids on chromosomes doubles after replication, however the nuclei stay diploid…

Q: During which stage(s) of meiosis do you expect to find tetrads? Select one: a. Prophase I and…

A: It is a process where a single cell divides to produce four cells containing half the original…

Q: Genes A and B are on different chromosomes. An individual has the genotype: AaBb You sequence two…

A: Meiosis is the reductional division. during this the chromosome number is reduced to half and from a…

Q: In what way does the position of the heterozygous organism of two genetic loci on the same…

A: Crossing over puts new alleles together in combination on the same chromosome, causing them to go…

Q: a. If cell division during gametogenesis is non-meiotic, what is its consequence to the future…

A: A diploid somatic cell undergoes mitosis. a mitotic division results in two daughter cells which are…

Q: An individual heterozygous for a reciprocal translocation possesses the following chromosomes: A B •…

A: Translocation is caused Due to separation of a chromosome segment and its union to a non-homologous…

Q: In which phase of meiosis are the pairs of sister chromatids lined up along the middle of the cell?

A: For reproduction of an organism to occur, the original parent cell will undergo Meiosis to create 4…

Q: Please explain the outcomes of nondisjunction in meiosis one versus nondisjunction in meiosis two,…

A: Introduction Meiosis is the reductional division as it involves the formation of 4 daughter cells…

Q: there are 9 chromosome pairs, how many univalents are there at anaphase I on each pole?

A: Anaohase 1 is the  stage of meiotic first division in which the paired chromosome separates and move…

Q: If nondisjunction occurs in humans for one pair of homologous chromosomes during meiosis I. The…

A: A chromosomal mutation may occur during anaphase I of meiosis cell division, where chromosomes fail…

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 Meiotic Nondisjunction?

A: Meiosis is also known as a double division that occurs in a diploid cell and gives rise to four…

Q: An individual is heterozygous for a reciprocal translocation, with the following chromosomes: A • B…

A: Translocation in chromosomes refers to the abnormal chromosomal rearrangement. It could be a…

Q: What would be the result if a chromosome did not have a kinetochore?

A: Deoxyribonucleic acid or DNA is the hereditary material present in the nucleus of the cell. It…

Q: A sexually reproducing organism has a haploid number of 4, consisting of two metacentric chromosomes…

A: The answer to the question is given in the image below. Kindly refer to the image.

Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.