Humans with aneuploidy who survive usually have incorrect numbersof chromosome 13, 18, or 21 or the sex chromosomes. A possibleexplanation why these abnormalities permit survival is becausea. the chromosomes have clusters of genes that aid in embryonicgrowth.b. the chromosomes are small and carry relatively few genes.c. of X-chromosome inactivation.d. of both b and c.

Q: Humans have 23 chromosomes per set. A person with 45 chromosomescan be described as beinga.…

A: Normally, humans have 23 pairs of chromosomes i.e. 46 chromosomes in total. But sometimes, due to…

Q: If a set of chromosomes is one copy of each kind of chromosome, how many sets are in a human…

A: The formation of male and female gametes required meiotic cell division, in which the parent germ…

Q: Describe the process of X-chromosome inactivation in mammals

A: X-chromosome inactivation, also known as lyonization, is a process by which one of the copies of the…

Q: Which of the following statements accurately describes a differencebetween mitosis and meiosis?a.…

A: Answer is e.) Both a and c are correct.

Q: 57. male sex organs; unusually small testes A. down syndrome B. edward's syndrome C. patau's…

A: A genetic disorder is an illness caused partially or entirely by a deviation from the usual DNA…

Q: Which of these results from aneuploidy?a. Turner syndromeb. fetal alcohol syndromec.…

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

Q: In humans, what is characteristic of the y chromosome? a. Submetacentric centromere b. No satellites…

A: Note: As per Guidelines, We Can Answer One Question At A Time. Ask Again To get rest answers.…

Q: The marking process for genomic imprinting initially occursduringa. gametogenesis. c. embryonic…

A: Genomic imprinting basically refers to the phenomenon of gene expression in a…

Q: A diploid fruit fly has eight chromosomes. Which of the followingterms should not be used to…

A: Drosophila is a flies genus that belongs to the family Drosophilidae and the members of this are…

Q: Meiosis explains whya. you inherited half of your DNA from each of your parents.b. the sister…

A: All the cells undergo differentiation and regeneration forming two types of cells, somatic cells…

Q: You are interested in the expression of regions of the X chromosome at different times in human…

A: The investigation of the X chromosome at different phases of human fetal development is a complex…

Q: Explain the process of X-Chromosome Inactivation in Mammalian Females.

A: Mammals are the vertebrate having mammary glands as one of their main characteristics which…

Q: Why are multiple copies of the X chromosome tolerated?

A: In females, two X are present whereas in males only one X is present. To balance the expression of…

Q: The given picture is a homologous chromosome pair that shows this behavior pachytene: a. what is…

A: Cell division is the process of division of cell into daughter cell. Generally cell divides by the…

Q: In fruit flies, dosage compensation is achieved bya. X-chromosome inactivation.b. doubling the…

A: Dosage compensation refers to the mechanism of equalizing or balancing the expression of genes. It…

Q: Crossing over....  a. leads to the exchange of material between homologous chromosomes in meiosis.…

A: Crossing over occurs in the pachytene stage of meiosis 1. Recombination of genes occurs because of…

Q: How does X inactivation contribute to a person’s phenotype? a. It controls the number and kind of…

A: X chromosome denotes one of the two sex chromosomes, another is the Y chromosome. Females are…

Q: genes relies on the existence of ovoD, a dominant female sterile mutation of the ovo gene, whichis…

A: Hello there! As you have posted multi-part questions, we are answering only the first question. If…

Q: The size of the deleted chromosomal piece a. is correlated with cytoplasmic streaming only O…

A: Deletion is a genetic aberration in which a part of chromosome or a DNA sequence  is removed during…

Q: Crossing over is the process wherebya. homologous chromosomes cross over to opposite sides of the…

A: Answer: Introduction: Crossing over means which occurs among the homologous chromosomes to rise…

Q: Pairs of chromosomes with almost identical geneticcomposition and that are found in cells of both…

A: Chromosomes are the vital part of heredity , that include a thin thread like structure. Chromosome…

Q: During crossing over,a. chromatids of homologous chromosomes exchange parts.b. mutations occur with…

A: Answer- Cells undergo two different types of cell division called as mitosis and meiosis.

Q: Which of the following statements is not correct ? a. Homologous chromosomes are separated during…

A: Few statements are given, have to identify the incorrect statement. Mitosis - one round of…

Q: Explain about inactivated X chromosome in female mammalian cells ?

A: The sex of the offspring is generally genetically determined by the genes present on the sex…

Q: In a trisomic individual, such as a person with trisomy 21 (Down syndrome),a genetic imbalance…

A: Trisomy 21 is a common genetic defect that is caused by chromosomal abnormalities. Trisomy 21 refers…

Q: Occasionally during meiosis, a mistake can happen whereby a gametemay receive zero or two sex…

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

Q: In an embryo from a homozygous Bicoid mutant female,which class(es) of gene expression is (are)…

A: The embryo is an early stage of the development of a multicellular organism. Embryonic development…

Q: Chromosome duplications often result in abnormal phenotypes because a. developmental processes…

A: Duplication is a type of mutation. It involves the production of more copies of a particular region…

Q: What biological mechanism allows humans with an XXX genotype to be healthy individuals?

A: Answer. Option (c) X inactivation

Q: Can chromosome duplications cause negative effects to an organism? Why or why not?   A. No.…

A: In genetics, chromosome duplications can be described as a process that includes mutations causing…

Q: A patient has mental deficiency, a short stature, and the mongolian type of the eyelid fold. The…

A: A pateint has mental deficiency, a short stature, and Mongolian type of the eyelid fold. The…

Q: Abnormalities in the number of X chromosomes tend to be milder than the same abnormalities in…

A: Introduction: Chromosomes are easily recognised on a karyogram due to their number, size, shape, and…

Q: According to the Lyon hypothesis,a. one of the X chromosomes is converted to a Barr body insomatic…

A: Lyon hypothesis, proposed by Mary Lyon states that the random inactivation of the X chromosome in…

Q: . A woman with Turner syndrome is found to be colorblind (an X-linked recessive phenotype). Both her…

A: Turner syndrome is a chromosomal disorder that impairs women's development. Half of the sex…

Q: Which of the following best describes Klinefelter syndrome?   A. It is an example of aneuploidy.…

A: Klinefelter syndrome is a genetic condition that results when a boy is born with an extra copy of  X…

Q: In addition to DNA swapping, another contributor to the uniqueness of eggs/sperm and people is…

A: Mutation  It is defined as a change that takes place in the DNA sequence. This alteration is due to…

Q: Which of the following best explains why chromosomes 13, 18 and 21 are the only autosomes that are…

A: A trisomy is a type of polysomy in which there are three instances of a particular chromosome ,…

Q: What is characteristic of a pair of homologous (maternal and paternal) chromosomes? O a. G banding…

A: Introduction:- Homologous chromosomes, also known as homologs, are made up of two chromosomes, one…

Q: Are the following events best explained by mutation or epimutation? A. imprinting of the Igf2 geneB.…

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: How is homologous recombination for DNA repair different from recombination in meiosis? Choose all…

A: Homologous recombination (HR) is a significant DNA repair process in bacteria.  Also, produce…

Q: The characteristic “X” shape of chromosomes is _____. a. a result of maximum compaction of the…

A: The X-shape is also not one chromosome: it's two. One of the two angled columns that make that “X”…

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.