About aneuploidies: O gonosome aneuploidy can change the apparent sex in humans O autosomal aneuploidy can alter apparent sex in Drosophila O no correct answer O gonosome aneuploidy can alter apparent sex in Drosophila autosomal aneuploidy can alter apparent sex in humans
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- In C. elegans there are two sexes: hermaphrodite and male. Sex is determined by the ratio of X chromosomes to haploid sets of autosomes (X/A). An X/A ratio of 1.0 produces a hermaphrodite (XX), and an X/A ratio of 0.5 results in a male (XO). In the 1970s, Jonathan Hodgkin and Sydney Brenner carried out genetic screens to identify mutations in three genes that result in either XX males (tra-1, tra-2) or XO hermaphrodites (her-1). Double-mutant strains were constructed to assess for epistatic interactions between the genes (see table). Propose a genetic model of how the her and tra genes control sex determination.In the life cycle of an animal, __________ are haploid and _________ are diploid gametes/ sex cells gametes/ somatic cells somatic cells/ gametes somatic cells/ sex cells body cells/ gametesWhich of the following statements are correct? Explain your answers. A. The egg and sperm cells of animals contain haploid genomes. B. During meiosis, chromosomes are allocated so that each germ cell obtains one and only one copy of each of the different chromosomes. C. Mutations that arise during meiosis are not transmitted to the next generation.
- Using Drosophila notation: A.) Diagram the genotype of a female fly that is recessive for apterus (ap, chromosome 2), heterozygous wild-type for black (b, chromosome 2), recessive for forked (f, x-chromosome), and homozygous wild type for rosy (ry, chromosome 3). B.) Diagram the genotype of a male fly that is heterozygous for clot (ct) eyes (an autosomal gene) and has yellow (y) body color (x-linked gene).Drosophila melanogaster has four pairs of chromosomes. Sperm for this species are formed by a meiotic process in which homologous chromosomes pair and segregate but do no undergo crossing over. How many genetically different kinds of sperm could be produced by a drosophila melanogaster male? 416 256 64 8The most common phenotype of a Drosophila fly in nature is called Choose 1 answer from below: wild type. wildebeest. wild thing. a and b, but not c None of the above
- Mutations Can Uncouple Chromosomal Sex from Phenotypic Sex Give an example of a situation in which genetic sex, gonadal sex, and phenotypic sex do not coincide. Explain why they do not coincide.Using your knowledge of meiosis, explain why Drosophila progeny remain diploid? (2n=8)In mammals, sex is determined bya. the SRY gene on the Y chromosome.b. having two copies of the X chromosome.c. having one copy of the X chromosome.d. both a and c
- Please DEFINE the following terms, and explain how they apply to Andean Condors: Homogametic sex Heterogametic sexA diploid fruit fly has eight chromosomes. How many total chromosomeswould be found in the following flies?A. TetraploidB. Trisomy 2C. Monosomy 3D. 3nE. 4n + 1During the study of your genetics course, you are learning the different developmental stages of a unique Tsetse fly, named defsis-timen, and you discover differences in their developmental pattern i.e. unusual and normal...... Rest of the question is in picture Answer part b and c And in part c its unlinked genes not unlined