Although triple-X human females typically have normal offspring, what kinds of gametes, with respect to the X chromosomes, would you expect from such XXX females? Draw meiotic stages that show the gametes that are expected to be produced.

Q: In meiosis, after telophase I, do other cells (comparing one another) have the same combination of…

A: Cell cycle consists of stages of cell growth and reproduction. In M phase of cell cycle, cell…

Q: that a gamete underwent meiotic non-disjunction. Explain two possible outcomes for the zygote that…

A: In normal anaphase that occurs during the cell division, sister chromatids are pulled by…

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: During oogenesis, nondisjunction of X chromosome occurred in meiosis I. If the resulting egg unites…

A: Non disjunction is the failure of chromosomes / chromatids to separate during Anaphase. In Meiosis…

Q: Why are newborns with an abnormal sex chromosome number more likely to survive than those with an…

A: Humans have a total number of 46 chromosomes that is 23 pairs of chromosomes in which 22 of them are…

Q: (i)Draw a diagram of Metaphase I and II of meiosis in the father, which illustrates the only…

A: In this situation, we need to figure out the genes and processes that cause a particular child to…

Q: The gibbon has 44 chromosomes per diploid set, and the siamang has 50 chromosomes per diploid set.…

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

Q: A female is heterozygous for an X-linked gene.  If nondisjunction happens for the sex chromosomes…

A: Introduction :  Aneuploidy is the term used to describe a cell that has an abnormally high/low…

Q: For a certain chromosomal region, the mean number of crossovers at meiosis is calculated to be two…

A: In the meiotic cell division process, a single germ cell divides twice to produce four non-identical…

Q: If the 2n chromosome number of an organism is 12: (a) what is the probability of having a spermatid…

A: Probability is equal to number of outcomes divided by total possible outcomes. Diploid number of…

Q: In the process of Oogenesis in animal cells, will the genotype of the second polar body (derived…

A: The process of ova formation also referred to as the formation of female gametes, is characterized…

Q: Though an individual with abberations such as Robertsonian translocation may be phenotypically…

A: Meiosis is defined as a process where a single cell will divide twice to generate four cells that…

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: During the human life cycle, what process is responsible for reducing thenumber of chromosomes from…

A: Cell division which halves the chromosomes number from 46 to 23--  We have to understand the cell…

Q: What is crossing over? In which period of meiosis does this event occur?

A: Introduction - Crossing over is a biological event in which chromosomes of the same kind line up…

Q: In a human secondary spermatocyte, if the chromatids of one chromosome failed to separate during the…

A: The failure of separation of sister chromatids during cell division is termed nondisjunction. In a…

Q: A male baby is born with the sex-chromosomeconstitution XYY. Both parents have normal sex…

A: The failure of separation of sister chromatids during cell division is termed nondisjunction. In the…

Q: Let’s suppose that a cell is heterozygous for three different genes (Aa, Bb, and Cc) and that each…

A: Meiosis is the process of reductional division that is divided into two stages known as meiosis I…

Q: Structurally, meiotic cohesins have different components than mitotic cohesins. This leads to what…

A: The "cell cycle", also known as "cell division", is a set of processes that occur in a cell leading…

Q: Suppose you discover two interesting rare cytological abnormalities in the karyotype of a human…

A: To find: To find the proportion that has the same karyotype using the given pair of chromosomes

Q: Describe how meiosis provides for genetic variability.If an animal had a haploid number of two (no…

A: Meiosis provides genetic variability : during prophase I , the double chromatid homologous pairs of…

Q: (a) Do you see any differences between the onion and whitefish blastula cells in anaphase? (b) These…

A: Approach to solving the question: Detailed explanation:  Examples: Key references:

Q: What is crossing over? In which period of meiosis does this event occur?

A: Meiosis is a mode of cell division in which a cell divides into four cells. It occurs in gametes.

Q: Which, if any, of the following sex-chromosome aneuploids in humans are fertile: XXX, XXY, XYY, XO?

A: Aneuploids are a kind of chromosomal mutations which results in abnormal number of chromosomes.

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: Meiosis is characterized by the pairing of homologous chromosomes during prophase I. In many…

A: Introduction :- Meiosis is the reduction division through in which  gametes are formed from parent…

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: specific human individual with a male sex has the same sex chromosome complement as a metafemale…

A: Metafemale: 3 sets of X chromosomes or in other words an extra X chromosome with autosomes

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: For a certain chromosomal region, the mean number ofcrossovers at meiosis is calculated to be two…

A: For a certain chromosomal region, the mean number ofcrossovers at meiosis is calculated to be two…

Q: Assume that meiotic nondisjunction event causes trisomy 8 in a newborn. If two of the three copies…

A: Nondisjunction is that the failure of the chromosomes to separate, that produces daughter cells with…

Q: In which meiotic division does independent assortment of unlinked genes occur? What does…

A: Cell division is a process by which a cell divides and it is necessary for the growth and…

Q: Describe the cytological observation that suggests that crossing over occurs during the first…

A: The reductional cell division is the meiosis. It happens in two major stages- meiosis I and meiosis…

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: Describe the final cellular products produced when a primary oocyte undergoes meiosis (I and II) in…

A: The process of the formation of new organisms from existing organisms is called reproduction. There…

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: Consider a cell with 2 pairs of homologous chromosomes where Chromosome 1 with genes VWXYZ is the…

A: The impact of Chromosome 1 (YZ genes) and Chromosome 3 (ST genes) reciprocal translocation on the…

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.