Why do you think that humans with trisomy chromosome 13, 18,or 21 can survive but other trisomies are lethal? Even though Xchromosomes are large, aneuploidy of this chromosome is alsotolerated. Explain why.

Q: Chimpanzees, gorillas, and orangutans all have 48 chromosomes, whereas humans have 46. Human…

A: When a part of a chromosome breaks off and gets translocated to another chromosome, leading to…

Q: homologous

A: Alleles are a pair of genes that share the same chromosomal location and regulate the same…

Q: During meiosis when crossing over occurs in a paracentric inversion loop, what percent of the…

A: Meiosis is the process of cell division that produces four daughter cells from a single cell. These…

Q: What is the number of sex chromosomes in male honey bees?

A: Introduction  A sex chromosome is a chromosome that is variable in form, size, and function from an…

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

A: The scenario described is indicative of a rare genetic condition known as unbalanced translocation.…

Q: The accompanying illustration shows one possible outcome of the random alignment of homologous…

A: Meiosis is a type of cell division in which a diploid mother cell divides into four genetically…

Q: About 5% of individuals with Down syndrome havea chromosomal translocation in which a third copy…

A: Humans have 23 pairs of chromosomes, that is, the normal chromosome number is 46. Translocation can…

Q: Scenario 2: Down's syndrome can be caused by either a trisomy of chromosome 21 (2n=47 (+21)) or a…

A: Down syndrome is a genetic disorder that can be caused by two main mechanisms:Trisomy 21: This is…

Q: If nondisjunction occurs in humans for one pair of homologous chromosomes during Meiosis 1, what…

A: Humans have 23 pairs of chromosomes i.e. 46 chromosomes (diploid). After meiosis, each of the gamete…

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: In general, why do changes in chromosome structure or numbertend to affect an individual’s…

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

Q: 1. Let's take the example of the gray kangaroo (Macropus fuliginosus) whose ploidy is 8 and the…

A: In this study, we are going examine the karyotype of the grey kangaroo (Macropus fuliginosus),…

Q: Fetuses whose cells are triploid, that is, contain three full sets of chromosomes, develop to term…

A: INTRODUCTION The DNA molecule is packed into thread-like structures called chromosomes in the…

Q: What are the chromosome configuration that will be observed at diakinesis in the following…

A: Chromosome are thread-like structures present inside the nucleus of a cell. Chromosomes are made up…

Q: The incidence of Down syndrome will be high (nearly 50%) among the offspring of a parent with Down…

A: Down Syndrome is a chromosomal disorder where trisomic conditions occurs in 21th chromosom. The…

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: A rare form of dwarfism that also includes hearing loss was found to run in a particular family. It…

A: The inheritance patterns explain how a disease is transmitted in families. These patterns help to…

Q: A diploid cell in a Canadian beaver will have 20 pairs of homologous chromosomes. Which of the…

A: A haploid gamete contains half the number of chromosomes as a diploid cell. In this case, a diploid…

Q: If nondisjunction occurs in humans for one pair of sister chromatids during Meiosis 2, what…

A: In chromosome non-disjunction, the segregation of sister chromatids is prevented. It results in 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: XAMPLE 2: The parents in the family above produce another son, this time with two Y chromosomes and…

A: The nondisjunction occurs in the father in which during the second meiotic division nondisjunction…

Q: Humans and many other complex organisms are diploid, possessing two sets of genes, one inherited…

A: Evolution is the process of development of an organism in such a manner that it has an advantage…

Q: Certain plants may have more than two copies of a chromosome. In some wild strawberries octoploid…

A: ExplasnatonPloidy is defined as the number of complete set of chromosomes. For example, an organism…

Q: Can structural aberrations on certain chromosomes lead to aneuploidy? If yes, explain.

A: Introduction : Changes in the number or structure of chromosomes is referred to as chromosomal…

Q: One reason that worker bees forgo their own reproduction to help their sister (the queen) reproduce…

A: In Haplodiploid behaviour female  are diploid and male are haploid.   Females  are diploid. They…

Q: You are an allele on a single uncondensed chromosome in a Yellow fever-carrying mosquito (Aedes…

A: The somatic cells follow the mitotic process for division and the reproductive cells or gametes are…

Q: Why are people with balanced chromosomal translocations phenotypically normal? Do they suffer from…

A: Chromosomal translocations are genomic events in which either a part or the entire chromosome breaks…

Q: At the end of Meiosis I, did homologous chromosomes separate or did chromatids separate? At the end…

A:

Q: Are homologous chromosome pairs present in a diploid cell? Are they present in a haploid cell?

A: A gene is the essential physical and functional unit of heredity. They are comprised of DNA…

Q: You are an allele on a single uncondensed chromosome in a Yellowfever-carrying mosquito (Aedes…

A: The fundamental and active process by which a parent cell after replication of its components,…

Q: Two phenotypically normal parents produce an abnormal son in which chromosome 14 is missing part of…

A: Translocations are chromosomal rearrangements caused by the exchange of components between two…

Q: Suppose you have a line of mice that has cytologicallydistinct forms of chromosome 4. The tip of the…

A: When we cross a 4K/4S female with a male, the progeny obtained are 4K/4 or 4S/4 as expected. We also…

Q: With two pairs of homologous chromosomes, four kinds of gametes can be produced. How many kinds of…

A: Gametes are formed by the process of meiosis in the gamete mother cells.

Q: An allotetraploid plant has 30 chromosomes in its somatic cells and one of its progenitor species…

A: Introduction  A chromosome is a lengthy DNA molecule that contains all or a portion of an organism's…

Q: Why are the X and Y chromosomes not considered homologous even though they recombine at the PAR…

A: Sex chromosomes are a type of chromosome that participates in sex determination. Humans and most…

Q: The STR DNA marker DS11 is located on the p arm of the chromosome #8 in humans. Molecular analysis…

A: A pattern of two or more nucleotides repeated next to each other is known as a short tandem repeat…

Q: Name the disorder with choromosome compliment 22 pairs of autosomes +21st chromosomes +XY?

A: Normally every human cell contains 23 pairs of chromosomes i.e. 46 chromosomes but sometimes, some…

Q: In animals there are many aneuploidies in sex chromosomes that have relatively mild phenotypes.…

A: Aneuploidy of autosomes is not tolerable and usually lethal because of the fact that embryos have…

Q: Assume that you were examining a first polar body and noted that it had one copy (dyad) of each…

A: Disjunction results in the separation of the two homologous chromosomes during cell division, for…

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.