In elegans, lon-2 and unc-2 are recessive mutations that are 8 map units apart on the X chromosome. An hermaphrodite who is Lon and Unc is mated to a wild-type male.  An F1 hermaphrodite is mated to a wild-type male.  What are the expected percentages of the different recombinant phenotypes among the male progeny?

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

A: The male-determining gene in humans is termed as the sex determining region Y (SRY) gene. Generally…

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: In Drosophila,, the curled mutation (cu, chromosome 3, position 50.0) results in wings that curl up,…

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

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: Imagine Drosophila genes C, D, and E are autosomal genes located close to each other on the same…

A: If many genes are located on the same chromosome then the crossing over between them will be reduced…

Q: Consider and individual with 3 pairs of homologous chromosomes labeled as: A/a B/b D/d (where the…

A: The gametes are produced by the meiosis process by which a diploid (2n) organism produce haploid (n)…

Q: diploid individual is heterozygous for a chromosome rearrangement. The original chromosome and its…

A: Meiosis ensures the production of haploid phase in the life cycle of sexually reproducing organisms…

Q: In Drosophila, a cross was made between a yellow-bodied male with vestigial wings and a wild-type…

A: Genes can be defined as an important unit of inheritance. A pair of genes is called allele. These…

Q: Drosophila may be monosomic for chromosome 4, yet remain fertile.Contrast the F1 and F2 results of…

A: Chromosomes are thread-like structures found in the nucleus of plant and animals. DNA is packed into…

Q: y ec +y ec w Determine the order in which th Occur on the chromosome and pr 7.22 A cross involving…

A:

Q: Inversions are known to affect crossing-over. The following homologs have the indicated order (the…

A: It is paracentric inversion. The diagram below show the replication during meiosis

Q: Butterflies have an X-Y sex-determination system that is different from that of flies or humans.…

A: -The butterfly shown has a completely unique pattern of colors because o a special trait- it has two…

Q: Table 8.1 shows that Turner syndrome occurs when an individual inherits one X chromosome but lacks a…

A: Chromosomal deletion syndrome occurs when whole or part of chromosomes are missing. Turner Syndrome…

Q: In Drosophila the genes forked bristles (f and f+) and vermilion eyes (v and v+) are ~24 m.u.  apart…

A: During meiosis, genes between homologous chromosomes are transferred in genetic recombination, which…

Q: In a cross between a white-eyed female (ww) and a red-eyed male (w+Y), nearly all the progeny were…

A: When a cross takes place between a white-eyed female (ww) and a red-eyed male (w+Y), nearly all the…

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: Jeff's spermatogonium (precursor sperm cell before meiosis) looks like the cell on the left (only…

A: The improper separation of the sister chromatids or the homologous chromosomes during meiosis leads…

Q: crossing over within a pericentric inversion produces chromosomes that have extra copies of some…

A: Chromosomes having extra copies or no copies of genes are produced by crossing over within a…

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: The phenotype of crooked wings (cw) in Drosophila melanogaster is caused by a recessive mutant gene…

A: The expected phenotypes as per the dihybrid phenotype ratio and their proportionate numbers out of a…

Q: Waxy endosperm (wx), virescent seedling (v), and shrunken endosperm (sh) are all recessive mutants…

A: Introduction: Endosperm is a tissue present inside the seeds of most of the angiosperms which…

Q: Determine the linear order of the genes on the chromosome (which gene is in the middle?).

A: The given question deals with the crossing over event. The highest crossover classes indicate the…

Q: L, R, P and D are four genes located on the same chromosome in a diploid organism. Map distances…

A: Genetic mapping is a technique to determine the relative position of genes on a chromosome and their…

Q: The duck-billed platypus has a unique mechanism of sex determination: females have five pairs of X…

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

Q: The genes F and G are on the same chromosome in a eukaryote. Using a microscope, you can see that a…

A: F and G are on the same chromosome. The cross is between FG//fg × fg/fg. The gametes produced will…

Q: In Drosophila, an X-linked recessive mutation, Xm causes miniature wings. List the F2 phenotypic…

A: Inheritance patterns are broadly of two types :- autosomal and sex-linked. They are further of two…

Q: Two different genes are located on the same chromosome in rabbits. A particular female rabbit is…

A: Genes on different chromosomes are inherited independently of each other because each pair of…

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

A: Meiosis creates gametes such as egg and sperm cells. During meiosis, the genetic information is…

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

A: Translocation is caused Due to separation of a chromosome segment and its union to a non-homologous…

Q: 20) When Thomas Hunt Morgan crossed his red-eyed F1 generation flies to each othe F2 generation…

A: Chromosomal Theory of Inheritance Thomas Hunt Morgan studied inheritance in Drosophila and provided…

Q: In Drosophila, males from a true-breeding stock with raspberry-colored eyes (instead of normal…

A: True breeding is a sort of mating in which the parents generate kids with the same phenotype as the…

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

A: Translocation in chromosomes refers to the abnormal chromosomal rearrangement. It could be a…

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.