Meiotic nondisjunction is much more likely than mitotic nondisjunction.Based on this observation, would you conclude that meioticnondisjunction is usually due to nondisjunction during meiosisI or meiosis II? Explain your reasoning?

Q: Common red clover, Trifolium pratense, is a diploidwith 14 chromosomes per somatic cell. What…

A: Ploidy is the change in the number of chromosomes among organisms. It can be distinguished into two…

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

A: Translocation is caused by the separation of a chromosome segment and its union with a…

Q: . Common red clover, Trifolium pratense, is a diploidwith 14 chromosomes per somatic cell. What…

A: Somatic cells also are known as vegetal cells have two sets of chromosomes and are thus considered…

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

A: Cell division is a procedure in which a parent cell divides into two daughter cells. The cell cycles…

Q: An organism has a diploid number of 20 in a primary oocyte. a. How many tetrads are present in the…

A: Oogenesis is a kind of gametogenesis. It produces four haploid gametes (egg) from single parent…

Q: In a diploid organism of genotype A/a; B/b: D/d, the allele pairs are all on different chromosome…

A: Anaphase comes after the process of metaphase. In this stage of cell division, chromosomes which are…

Q: In an attempt to simplify meiosis for the benefit of students, mad scientists develop a way of…

A: Meiosis is the reduction division that occurs in the germline cells of the gonads. In this cell…

Q: A diploid organism is heterozygous for 4loci,how many types of gamete can be produced?

A: 'Locus' is a term which is used to denote the fixed position of a gene on the chromosome. A gene…

Q: Nondisjunction can occur at either the first or second division of meiosis. XXY individuals could…

A: When homologous chromosomes or sister chromatids fail to separate properly during cell division, is…

Q: Below is a diploid cell in meiosis. a. How many 'a' alleles are present in Anaphase 1? b. How many…

A: A cell undergoes cell division to make daughter cells .For cell division it must undergo replication…

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: The somatic cells of most individuals with Down syndrome contain an extra chromosome 21, for a total…

A: Chromosomes are composed of proteins and Deoxyribonucleic Acid (DNA). These structures are in the…

Q: A diploid organism is heterozygous for 4 loci, how many types of gametescan be produced?

A: Loci refer to the fixed position on a chromosome. Heterozygous organisms have different alleles for…

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: 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: In an attempt to simplify meiosis for the benefit of stu-dents, mad scientists develop a way of…

A: The cell cycle is a four-stage process in which the cell increase in size (gap 1, or G1, stage),…

Q: boy with Klinefelter syndrome (47,XXY) is born to a mother who  is  phenotypically  normal  and  a…

A: Klinefelter syndrome is a rare disorder that is caused in males alone. It is due to the presence of…

Q: You observe a very large pairing loop at meiosis. Is it more likely to be from a heterozygous…

A: The cell is the fundamental underlying, useful, and natural unit of every known life form. Cells are…

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: In Figure 17-12, what would be the constitution of an individual formed from the union of a…

A: Trisomy and monosomy are two types of chromosomal abnormalities. Trisomy is when a person has an…

Q: A color-blind woman with Turner syndrome (XO) has a father who is color blind. Given that the gene…

A: Given that the gene for the color-blind condition is recessive and X-linked and a color-blind woman…

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: Distinguishing Meiosis I from Meiosis II How do you know what is meiosis I and what is meiosis II?…

A: Cell division is the term to state the usual process of reproduction in unicellular organisms and…

Q: Assume that during meiosis I none of the C chromosomes disjoin at metaphase, but they separate into…

A: Cellular division is the process of one cell splitting into many. This process is present in all of…

Q: The kidney bean plant, Phaseolus vulgaris, is a diploid speciescontaining a total of 22 chromosomes…

A: Polyploidy is a numerical abnormality which consists of more than two pair of chromosomes. It is…

Q: Why does nondisjunction in meiosis I results in a higher proportion of faulty gametes than…

A: Of all the chromosomal disorders, the most readily recognisable from a karyogram are chromosome…

Q: What event/s during meiosis is simulated by the flipping of the coin? Explain these events briefly.…

A: Probability is the possibility of a particular result occurring. For instance, what is the…

Q: In an organism with a haploid number of 7, how many possible combinations of maternal and paternal…

A: Meiosis is a special type of cell division of germ cells in sexually-reproducing organisms used to…

Q: why do the daughter cells produced from meiosis 1 need to divide again in meiosis 2

A: In eukaryotes, two types of cell division occur mitosis and meiosis. Both mitosis and meiosis are…

Q: Nondisjunction results in uneven distribution of chromosomes during meiosis. Which of the following…

A: Non-disjunction occurs when the chromosomes do not separate properly, leaving gametes with one…

Q: For each of the following types of chromosomalaberrations, tell: (i) whether the chromosomes of…

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

Q: Which case of nondisjunction is MOST likely to result in the production of an aneuploid cell? A.…

A: Nondisjunction is the improper segregation of chromosomes as a result of the failure of the…

Q: If this happens in Meiosis I, it results in two gametes that are n + 1 and two gametes that are n -1

A: The result of a normal mitosis or meiosis is that all the progeny cells receive a complete set of…

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: 2n=46 2. 3. MeioticStage: MeioticStage: Diploid no: Haploid no: Diploid no: Haploid no:

A: Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half…

Q: A diploid organism has five pairs of chromosomes in each somatic cell. Assuming that no crossing…

A: When the DNA molecule is well organized and packaged into thread-like structures in the nucleus 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: A diploid (2n) trihybrid individual with the genotype AaBbDd can make eight genetically different…

A: Meiosis is the process of cell division, which takes place in higher organisms that reproduce by…

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: Meiosis is called a reduction division, but all the reduction occurs during meiosis I—no reduction…

A: Meiosis is a type of cell division that occurs in cells that produce gametes (sperm or egg) in…

Q: what are the possible different kinds of gametes produces by meiosis

A: Mendel's law of independent assortment dictates  that the alleles of two (or more) different genes…

Q: What is the mechanism of generating aneuploiding A) Mitotic unequal segregation of…

A: Aneuploids are the individuals whose chromosome number is not a multiple of the haploid number (n).…

Q: During metaphase I of meiosis, tetrads align along the metaphase plate independently of each other.…

A: Meiosis is a reductional division which generates haploid (n) daughter cells, each having half of…

Q: in the experiment of following chromosomal dna mvement througgh meiosis, why. do you use non-sister…

A: The cell division in which the number of the chromosome reduces to half in the daughter cells is…

Q: Meiotic nondisjunction usually occurs during meiosis I. What isnot separating properly: bivalents or…

A: Meiosis is the reduction division that takes place in the germ cells or sex cells. The genetic…

Q: Let’s suppose a pea plant is heterozygous for three genes, Tt Yy Rr, and each gene is on a different…

A: A gene is a sequence of nucleotides in a genome that codes for a specific functioning molecule.…

Q: What is the importance of chromosomal crossover events during meiosis I? Explain in a detailed…

A: Meiosis is a kind of cell division that produces four haploid daughter cells, each having half the…

Q: Down syndrome (trisomy 21) and Edwards syn-drome (trisomy 18) are the most common autosomal…

A: Trisomy is a type of aneuploidy. In trisomy we find three copies of chromosomes instead of two.Patau…

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: