A normal mother has translocations on chromosomes 14:21. With respect to chromosomes 14:21, how many combinations of chromosomes are possible? How many gametes are viable? If the woman has children with an normal father, what is the probability that there is a daughter with Down Syndrome or a son with an unaffected phenotype?

Q: In the fruit fly Drosophila melanogaster, a recessive condition called eyeless (ey) significantly…

A: First draw all the possible gametes for both the gametes. All gametes means all, including the…

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 does an extra chromosome 16 mean?

A: Chromosomes, the physical carriers of genes, are the microscopic thread like structures in which the…

Q: what is the benefit of crossing over?

A: REPRODUCTION:- It is the production of offspring from the parents. It is of two types:- 1)Asexual…

Q: A couple is planning to have three children. What is the probability of having all boys? *

A:

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: Determine whether the chromosomes are most difficult to segregate properly during meiosis in Down…

A: Introduction Trisomy is a type of aneuploidy. In trisomy, we find three copies of chromosomes…

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 phenotypically normal individual has the following combinations of normal and abnormal…

A: Chromosomal deletion is simply deletion of the part of the chromosome. Chromosomal inversion is a…

Q: For the following chromosome complements, what is the phenotypic sex of a person who has Q. XX with…

A: The sex-determining region Y (SRY) is located on the short branch of the Y chromosome, which…

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: A woman with a balanced reciprocal translocation of Chromosomes 4 and 20 (karyotype, right panel…

A: In a balanced reciprocal translocation genetic material is exchanged between two chromosomes with no…

Q: Does mitotic recombination occur in a gamete (sperm or egg cell) or in a somatic cell?

A: Cell division is typically a part of a broader cycle of cells. There are two distinct forms of cell…

Q: How many chromosomes are involved in duplication?

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

Q: What kind of chromosomal mutations is/are produced by unequal crossing over?

A: Mutation refers to both the process of altering a gene or chromosome and the outcome of that…

Q: Assume that color blindness is a recessive character on the X chromosome. A man and woman with…

A: Introduction  Inheritance referred to the transmission of character/traits in the form of gene from…

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: Is a trisomic an aneuploid or a polyploid?

A: Trisomy is a genetic condition in which an extra chromosome or part of a chromosome is added to a…

Q: The letters below represent genes found on different chromosome pairs. Letters that are similar…

A: The alleles are the alternative forms of a gene that are located on the same locus of a homologous…

Q: How does a chromosomal duplication occur?

A: When a part of chromosome is present in two copies or duplicated, it is known as duplication. This…

Q: You have set up a fly cross between red-eyed male flies and white-eyed female flies. Several days…

A: The objective of the question is to determine the most likely location of the gene for red eye color…

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: In the classic "X" figure of the chromosome, is the whole X from one parent, or is one side of the X…

A: Need to find whether the X of the chromosome is from whole chromosome or both from mother and…

Q: In C. elegans, lon-2 and unc-2 are recessive mutations that are 8 map units apart on the X…

A: A map unit is defined as the distance between two linked gene pairs where 1% of the products of…

Q: all of his sons   all of his daughters   half of his daughters and half of his sons   half of his…

A: X- inactivation or lyonization is a process in which one of the X- chromosome is inactivated in…

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: What is inversion heterozygote?

A: Inversion is a chromosomal rearrangement when a segment of chromosome breaks and then rejoins in…

Q: What kind of chromosomal mutations is/are produced by unequal crossing over?

A: Chromosome mutations are changes that arise in chromosomes as a result of nuclear division mistakes…

Q: Assume that color blindness is a recessive character on the X chromosome. A man and woman with…

A: Colorblindness is a sex linked disease in which the X chromosome is affected. In this type of…

Q: What is chromosomal mapping?

A: A chromosome contains all of the genetic material of an organism. Almost all the eukaryotic…

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.