Discuss whether or not the X and Y chromosomes are really distinct linkage groups?Hint(X and Y chromosomes have a few genes in common. These genes are inherited in a pseudoautosomalpattern.)

Q: Alterations in gene number may occur in various ways. Which of the folowing best describes a…

A: Euploidy refers to an equal number of chromosomes, which is the normal condition in cell division.…

Q: For a hexaploid what is the value of x where x refers to the basic chromosomenumber that makes up a…

A: Ploidy refers to the number of chromosomes present in the nucleus of a cell. In normal somatic…

Q: What is the n value for this organism

A: In this question, we have to find out the n value for tetra hybrid and heterozygous organism.

Q: An equational division of mitosis is occuring for a diploid organism that has three heterologous…

A: A fixed position on chromosome which is occupied by single or more genes, is called as Locus.…

Q: to what do correspond respectively the grey, black and dotted lines? Indicate below the name of the…

A: Replication is the process by which the single mother strand helps to produce two daughter strands.…

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: Consider and individual with 3 pairs of homologous chromosomes labeled as: A/a B/b D/d (where the…

A: The gametes are produced by the meiosis process by which a diploid (2n) organism produce haploid (n)…

Q: Which of the following does NOT accurately describe homologous pairs of chromosomes?

A: Homologous chromosomes are pairs of chromosomes that are similar in size, shape, appearance, gene…

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: . A redwood tree, Sequoia sempervirens is hexaploid with a total of 66 chromosomes. Considering…

A: The cell’s state of having more than two chromosomes in a set of chromosomes contains as polyploidy.…

Q: What would be the result from a nondisjunction of chromosome 21 in a zygote that is 46,XY? Explain…

A: In genetics, nondisjunction refers to chromosomes or sister chromatids that do not separate properly…

Q: Here is a situation in which there is a repeated sequence. This picture shows two homologous…

A: Chromosomal crossover explains the exchange of genetic material while sexual reproduction between…

Q: Consider the example of the fusion of chromosome 21 and 14. By itself, this fusion does not cause…

A: In humans, when the long arm of chromosome 21 is joined to the long arm of chromosomes 14 or 15, the…

Q: An equational division of mitosis is occuring for a diploid organism that has three heterologous…

A: The parent with genotype AAbbCCDD will have only one gamete that is AbCD and the parent with…

Q: A heterozygous diploid yeast Aa Bb went through meiosis. What percentage of the haploid spores will…

A: Recombination is defined as the process or method by which the DNA pieces are broken down and are…

Q: In Drosophila, the X chromosomes may become attached to one another (XXn ) such that they always…

A: Sex determination in Drosophila -  There is a chromosomal basis of inheritance occurs which is based…

Q: Suppose that meiosis occurs in the transient diploid stageof the cycle of a haploid organism of…

A: The synthesis phase involves the replication of DNA for distribution in the daughter cells. It is…

Q: Which of the following is false regarding Down Syndrome? O can be caused by a Robertsonian…

A: The thread like structures seen inside the nucleus of every cells are called chromosomes. These are…

Q: What type of chromosome or fragment cannot be formed by the following chromosome inversion…

A: An inversion is a chromosome rearrangement in which a segment of chromosome is reversed end-to-end.…

Q: In a diploid organism, two homologous chromosomes synapse at prophase 1 of meiosis.  One of the…

A: Crossing over is the process in which the exchange of genetic material takes place in a cell during…

Q: An equational division of mitosis is occuring for a diploid organism that has three heterologous…

A: Mitosis is a process where a single cell divides into two identical daughter cells (cell division).…

Q: Question: Draw one possible representation of the chromosomes in a cell after the equational…

A: Mitosis cell division is the type of cell division in which the number of chromosome numbers does…

Q: In mice, the Sry gene is located on the Y chromosome very close to one of the pseudoautosomal…

A: The chromosomes are the genetic material present in the nucleus of the cell which is a condensed…

Q: Where are chromosomal fragments of non sister homologs exchanged and remain as part of the process…

A: Crossing over happens all the time in  prophase I (Meiosis)  before formation of tetrads area unit…

Q: An equational division of mitosis is occuring for a diploid organism that has three heterologous…

A: Mitosis is the process that partitions newly replicated chromosomes equally into two daughter cells.…

Q: A chromosome with the following gene order has a paracentric inversion of BCDE. A B C D E F • G H If…

A:

Q: Discuss the following sets of terms: a) trisomy and triploidy, b) aneuploidy and polyploidy.

A: In human cells normal number of chromosomes is 46.Abnormality in this number results in syndromes or…

Q: crossing over within a pericentric inversion produces chromosomes that have extra copies of some…

A: Chromosomes having extra copies or no copies of genes are produced by crossing over within a…

Q: An equational division of mitosis is occuring for a diploid organism that has three heterologous…

A: The gametes are produced by the process of meiosis. The meiosis is a reductional division.

Q: Suppose that a recessive gene that produces a short tail in mice is located in the pseudoautosomal…

A: The pseudoautosomal region is a region of similarity between the X and Y chromosomes that is…

Q: An equational division of mitosis is occuring for a diploid organism that has three heterologous…

A: Mitosis is a kind of equational division. It produces the genetically identical daughter cells.

Q: Use karyotype nomenclature, for each diagram. (Total # of chromosomes, sex chromosomes, any added or…

A: Genetic disorders are the type of disorders that occur due to the presence of chromosomal…

Q: An equational division of mitosis is occuring for a diploid organism that has three heterologous…

A: Meiosis is a reduction and division. It produces the duaghter cells with half chromosomes.

Q: A person is born with one X chromosome, zero Y chromosomes,trisomy 21, and two copies of the other…

A: A chromosome is a compact structure of a DNA molecule wrapped around some proteins. It is generally…

Q: When 23 pairs of human chromosomes are arranged in a diploid set, this layout  is called a

A: A chromosome is a long DNA molecule with part or the entirety of the hereditary material of a…

Q: Consult Figure 1, which shows a human karyotype with chromosomes arranged in order of decreasing…

A: Eukaryotes usually have their genetic material packed and condensed into chromosomes and stored…

Q: Discuss the concepts of homologous chromosomes, diploidy, and haploidy. What characteristics do two…

A: Diploidy- means that both members of a homologous pair are present(2n).  Haploidy- the presence of…

Q: half the chromosomes of a human primary oocyte segregate into the first polar body, which…

A: The process of formation of gametes is different in males and females. In males, it is known as…

Q: Compare the following three terms: polyploidy, aneuploidy, and nondisjunction. Briefly discuss…

A: Ploidy is basically the number of sets of homologous chromosomes of a cell or an organism. The cell…

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: Why do you think that humans with trisomy chromosome 13, 18,or 21 can survive but other trisomies…

A: There are 23 pairs of chromosomes in which 22 pairs are the autosome and 1 pair is sex chromosome.…

Q: Give biological term for a pair of corresponding chromosomes of the same size and shape , one from…

A: A chromosome is the thread-like structure made up of DNA. It is tightly packed in the nucleus of a…

Q: consider the metaphase (mitosis) chromosome spread of the following related animal species. The…

A: The hybrid animal shows a mixture of paired and single chromosomes in it's first meiotic division.

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: explain the meiotic segregation of reciprocal translocations.

A: RECIPROCAL SEGREGATION results from exchange of two terminal segments from different chromosomes.…

Q: In the absence of recombination, sister chromatids have the following features EXCEPT for: O they…

A: Introduction :- The identical copies (chromatids) created by the DNA replication of a chromosome are…

Q: A diploid organism has a total of 14 chromosomes and about20,000 genes per haploid genome.…

A: Genetic linkage refers to the close association of genes chromosome that are located close to each…

Q: Consider three pairs of homologous chromosomes with centromere labeled A/a, B/B, C/c. How many kinds…

A: Meiosis is the process in which the germ cells for sexual mode of reproduction is formed. This…

Oogenesis

The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase. 

Cell Division

Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons: