Because of non-disjunction in some stocks of Drosophila. melanogaster, about 1 in 65,000 egg cells have two copies of the X chromosome and about 1 in 375 egg cells have no X chromosome. Assuming that meiosis in males is always normal', what is the expected frequency of XXX females and XO males arising from any number of fertilized eggs? Do not be concerned as to whether it is lethal or not.

Q: QUESTION 16 You have a pure breeding plant with red flowers, yellow seeds and red-veined leaves. You…

A: The three genes are involved in this cross. This is an example of trihybrid cross. The color of…

Q: 1 A 2 Daughter of normal meiosis I Daughter of abnormal meiosis I where non-disjunction occurred 3…

A: During meiosis, I, homologous chromosomes pair up and exchange genetic material through a process…

Q: For the following crosses, you will need to recall that ldeno by cross-fertilization between a male…

A: The fusion of male and female gametes from different organisms that belong to the same species is…

Q: Diploid Number of chromosomes, Sex Chromosomes, (+/- whole) Chromosome (+/- partial) e.g. 47, XY,…

A: Human cell contains 23 pairs of chromosomes.  22 autosomes and 1 pair of sex chromosomes. Human male…

Q: For a male with a genotype of AaBb Draw a primary spermatocyte which has just entered diakinesis be…

A: Primary spermatocyte : During spermatogenesis the male germ cells called spermatogonial cells divide…

Q: Plants from two different diploid species (2N = 32) are crossed producing infertile F1 plants. What…

A: The indirect process of cell division in which  the chromosomes of a parent cells divide ones but…

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: THEME 3: In Drosophila recessive mutants called a, b, c, and d all have the same phenotype; namely,…

A: Wild type individuals result when the Plus sign is indicated and this Plus sign occurs when the two…

Q: Diploid Number of chromosomes, Sex Chromosomes, (+/- whole) Chromosome (+/- partial) e.g. 47, XY,…

A: Turner syndrome, a condition that mostly affects the females, which is caused when one of the X…

Q: Drosophila females of wild-type appearance but heterozygous for three autosomal genes are mated with…

A: Let us represent the alleles responsible for wildtype eyes, wildtype bodies, and wildtype thoraxes…

Q: The STR DNA marker DS11 is located on the p arm of the chromosome #8 in humans. Molecular analysis…

A: The process of Recombination / crossing over during meiosis 1 leads to genetic variation in the…

Q: In what phase of meiosis is this cell? O metaphase I O prophase II O metaphase Il O prophase I O 000

A: metaphase I

Q: . Four of the following events are part of both meiosis andmitosis, but only one is meiotic. Which…

A: Mitosis is also called as somatic cell division, it is one of the type of cell division in which…

Q: What is the notation for the following cases? ( A female having Edwards syndrome (trisomy 18)

A: The chromosomal syndrome notation includes the total number of chromosomes, then the sex chromosome,…

Q: A woman with no phenotype is known to have a 14:21 translocation. 1. With respect to only…

A: The rearrangement of chromosomes in which one portion of the chromosome is breakdown and is attached…

Q: 34 m,u. Se a22mu ->CUE iamu e In Dropsophila, sepia eyes (se), curled wings (cu), and ebony body (e)…

A: Drosophila  is a species of flies, belonging to the Drosophilidae family, whose members are often…

Q: Assuming sexual reproduction and that no mutations have occurred. Please draw one possible genotype…

A: Genotype It is a description of our DNA's pair of alleles. The genotype of an offspring is…

Q: In the plant, Haplopappus gracile there is one long pair and one short pair of chromosomes. In the…

A: As given in the question, Haplopappus gracilis is a diploid have one short and one long pair of…

Q: If the amount of DNA in a diploid cell during G1 phase prior to meiosis I is 8 pg, how much DNA…

A: The G phase is a period of the cell cycle in which the cell grows and prepares for DNA replication.…

Q: What frequencies (%s) of gametes are produced by a female Drosophila of genotype A B/ a b when the…

A: Drosophila, sometimes known as fruit flies, has been used as a model organism in genetic study for…

Q: Diploid Number of chromosomes, Sex Chromosomes, (+/- whole) Chromosome (+/- partial) e.g. 47, XY,…

A: Aneuploidy is a condition of having fewer or extra chromosomes than the normal genome number of the…

Q: You are an allele on a single uncondensed chromosome in a Yellow fever-carrying mosquito (Aedes…

A: The somatic cells follow the mitotic process for division and the reproductive cells or gametes are…

Q: 1. Which phase of MEIOSIS does crossing-over occur? a) METAPHSE I b) PROPHASE I c) PROPHASE II d)…

A: Crossing over takes place at pachytene stage of prophase I of meiosis I. This event leads to…

Q: Incomplete Dominance 1. In snapdragons, red flower color (R) is incompletely dominant over white…

A: Incomplete Dominance In snapdragons, red flower color (R) is incompletely dominant over white flower…

Q: Identify the number of chromosomes in a typical human GERM cell during each stage of meiosis. For…

A: Answer :- The number of chromosomes in a typical human GERM cell during each stage of meiosis :-  *…

Q: What will be the effect on sexual development in newly fertilized Drosophila embryos if the…

A: In Drosophila, sex determination is achieved by a balance of female determinants on the X chromosome…

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: 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: In boreal daisies, flower color is controlled by a gene at locus B. Daisies with at least one…

A: The flower color in boreal daisies is controlled by the gene B. The B allele for blue petal is…

Q: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX Use the figure to answer the questions…

A: Meiosis is a sort of cell division that takes place in sexually reproducing organisms and produces…

Q: A woman with normal chromosomes mates with a man who also has normal chromosomes.  Q.Suppose that,…

A: Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate properly…

Q: THEME 2: The figure below shows the types and numbers of gametes produced by a trihybrid. Phenotype…

A: A cross which involves three loci is known as three point cross.There are  different types of…

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.