In the haploid yeast Saccharomyces cerevisiae, the twomating types are known as MATa and MATα. You cross apurple (ad-) strain of mating type a and a white (ad+)strain of mating type α. If ad- and ad+ are alleles of onegene, and a and α are alleles of an independently inherited gene on a separate chromosome pair, what progenydo you expect to obtain? In what proportions?

Q: In a testcross for two genes, what types of gametes are produced with (a) complete linkage, (b)…

A: Testcross is a breeding of an individual with homozygous recessive individual. The aim is to…

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: Three autosomal genes are linked along the same chromosome.The distance between gene A and B is 7…

A: Genetic mapping is a method which considers the recombination frequency as a measure of distance…

Q: In the fruit fly, recessive mutations in either of two independently assorting genes, brown and…

A: In Drosophila, as well as in many other plants and animals, pigmentation is highly variable both…

Q: The alleles his-5 and lys-1, found in baker’s yeast, result in cellsthat require histidine and…

A: The first step is to determine which asci are parental ditypes (PD), non-parental ditypes (NPD) and…

Q: Let’s say there is an organism with two pairs of alleles, W/w and Z/z, each pair is located on a…

A: Cell is the basic structural and functional unit of life. Group of cells is known as tissue.

Q: . If the G locus were 50 or more map units from the centromere, what types and proportions of…

A: Tetraploid means the the species has 4 copies of the genes present ie two diploid gametes would meet…

Q: n Drosophila, vermilion eye color is due to a recessive allele (v) located on the X chromosome.…

A: assuming that  : The wild type = allele+ / allele+ Heterozygote = allele+ / allele Mutants = allele…

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: Let’s say there is an organism with two pairs of alleles, W/w and Z/z, each pair is located on a…

A: Mitosis is a type of cell division that occurs in all the cells except sex cells. Here the…

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

A: Chromosome may be defined as the condense form of DNA that can be inherited from one generation to…

Q: Given the end results of the two types of division, why is it necessary for homologs to pair during…

A: Cell cycle is a series of changes that occurs in a newly divided cell through which it duplicates…

Q: Chromosomal nondisjunction of the X chromosome in female gametes of humans means that live offspring…

A: Nondisjunction of  X chromosomes during meiosis I will result in four abnormal gametes. Two gametes…

Q: In an autotetraploid organism, the gene controlling coat color is very near the centromere of the…

A: Autotetraploid Organisms --- Autotetraploidy -- It is defined as individual or strain whose…

Q: A heterozygous diploid yeast Aa Bb went through meiosis. What percentage of the haploid spores will…

A: Recombination is defined as the process or method by which the DNA pieces are broken down and are…

Q: In the following schematic drawing of a Holliday junction,one chromatid is shown in red, and the…

A: a) Cuts should occur at positions 2 and 4 to get recombinants. A Holliday model can be resolved in…

Q: Genes A and B are located 10 cM from each other on a chromosome. Gene C is located 25 cM from gene A…

A: As per the given values,The distance between A and B = 0.10The distance between B and C = 0.15The…

Q: An individual inherits a set of translocated chromosomes (2 and 3) from one parent and a wild type…

A: For certain basic eukaryotes, such as yeast, meiosis is the method used for survival. Yeast…

Q: diploid individual with two identical alleles for a particular gene is said to be:   a. homozygous…

A: An allele is a variant form of a gene. An organism that has two different alleles of the gene is…

Q: In a cross between two varieties of corn, gl1gl1Ws3Ws3 (egg parent) * Gl1Gl1ws3ws3 (pollen parent),…

A: Fertilization is the process of fusion of male and female gametes that results in the formation of a…

Q: Thorn apples produce either purple (P) or white (p) flowers, and their fruits are either spiny (S)…

A: Purple (P) flowers = dominant White (p) flowers= recessive Spiny (S) = dominant Smooth (s)=…

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: The mutant genes for vestigial wings and singed bristles are approximately 30 map units apart on…

A: Each gene has two alleles, one is a dominant allele and another is a recessive allele. If the mutant…

Q: In Drosophila, males from a true-breeding stock withraspberry-colored eyes were mated to females…

A: Recombination frequency (RF) is the rate of occurrence of recombination between a pair of linked…

Q: If the G locus were 50 or more map units from the centromere, what types and proportions of gametes…

A: Recombination in terms of genetics describes the process that explains the exchange of genetic…

Q: If the G locus were 50 or more map units from the centromere, what types and proportions of gametes…

A: Introduction Recombination:- It is a process by which pieces of DNA are broken and recombined to…

Q: In a vial of Drosophila, a research student noticedseveral female flies (but no male flies) with bag…

A: Fertilization is the process by which the male gamete, sperm, fertilize with the female gamete,…

Q: An initial crossover event will occur between A and B, as indicated in the corresponding image.…

A: Chromosomal crossover refers to the event when the genetic material is exchanged at the time of…

Q: In a haploid fungus, the genes al-2 and arg-6 are 30 m.u.apart on chromosome 1, and the genes lys-5…

A: Chromosomes These are the densely packed DNA structures with proteins.Multiple genes can be found on…

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

A: In a reciprocal translocation, two broken pieces are joined together which are non-homologous to…

Q: If two loci are 10 cM apart, what proportion of the cells in prophase of the first meiotic division…

A: * Given that two loci are 10cM apart (centimorgan) *Have to calculate the proportion of cells in…

Q: . In a diploid organism of 2n = 10, assume that you canlabel all the centromeres derived from its…

A: The formula that is used for the solution of this problem is 2n. Here, n stands for the different…

Q: a. In Drosophila, crosses between F1 heterozygotes ofthe form A b / a B always yield the same ratio…

A: Since you have posted a question with multiple sub-parts, we are answering only first one for you.…

Q: Alleles A and a are located on a pair of metacentric chromosomes. Alleles B and b are located on a…

A: A gene is the basic unit of heredity. Each gene, in humans, is composed of two alleles. Alleles are…

Q: In autotetraploid Chinese primrose (Primula sinensis L.), the gene controlling stigma color is  very…

A: In Chinese primrose (Primula sinensis L.), Green stigma (G) =dominant  Red stigma (g) = recessive…

Q: The alleles his-5 and lys-1, found in baker’s yeast, result in cellsthat require histidine and…

A: The alleles of beaker yeasts his-5 and lys-1 results in the cells that require histidine and lysine.…

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: Explain the following

A: Gametogenesis is the method leading to the formation of the female and male germs cells. The…

Q: The ABO blood type locus has been mapped on chromosome 9. A father with blood genotype BO blood and…

A: The presence or absence of the antigens A and B, which are borne on the surface of red blood cells,…

Q: An individual that is heterozygous for an inversion has the following chromosomes (∗ is the…

A: Introduction :-  Crossing over is defined as the exchange of segments ( chromosomal segments)…

Q: there are 9 chromosome pairs, how many univalents are there at anaphase I on each pole?

A: Anaohase 1 is the  stage of meiotic first division in which the paired chromosome separates and move…

Q: The genes for mahogany eyes and ebony body are approximately 18 map units apart on chromosome III in…

A: In Drosophila + indicates wild-type allele for any gene, m = mahogany  e = ebony.Female parents are…

Q: In Question 23, if one chromosome has R and T and the homologous chromosome also has R and T, does…

A: We are authorized to answer only one question at a time, since you have not mentioned which question…

Q: In Drosophila melanogaster, a yellow-bodied (dark coloured) male with vestigial (underformed) wings…

A: Drosophila malenogaster is a fruit fly from family drosophilidae.

Q: In a cross between two varieties of corn, gl1gl1Ws3Ws3(eggparent) x  Gl1Gl1ws3ws3 (pollen parent), a…

A: The working segment of DNA that mainly codes for a protein is a gene. Gene itself contains two…

Q: In a cross between a homozygous red-eyed female fruit fly and a white-eyed male fruit fly, what is…

A: Heterozygous alludes to having acquired various types of a specific quality from each parent. A…

Q: What would be the chromosome number of progeny resulting from the following crosses in wheat? What…

A: The complete chromosome sets present in the cells of an organism is referred to as ploidy. Humans…

Q: In autotetraploid Chinese primrose (Primula sinensis L.), the gene controlling stigma color is very…

A: Autotetraploid are the complex chromosome that form of four copies of single genome .

Q: Assume that the diploid number of a certain species is four chromosomes, two large and two small…

A: Haploid cell contains single set of chromosomes. Diploid cell contains two sets of chromosomes.…

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.