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A: The distance between the two genes N and L can be surveyed by making crosses and by examining the…
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A: The sexually reproducing organisms produce gammates that are the unit of sexual reproduction. The…
Q: Homologous chromosomes contain the same _________________, but may not contain the same…
A: Homologus chromosomes are the chromosomes with same genes. For example, we have a pair of…
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A: Meiosis is a cell division through which gametes are produced. One diploid eukaryotic cell divides…
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Q: . A white-eyed female Drosophila is mated with a redeyed (wild-type) male, the reciprocal cross of…
A: Dominant and recessive traits exist when a trait has two different forms at the gene level. The…
Q: Genes A and B are on different chromosomes. A dihybrid with the genotype AaBb undergoes meiosis.…
A: Genotype is the genetic makeup of and individual which determines the phenotype of an individual. In…
Q: Genes that are present on one sex chromosome but not theother are called_________ .
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Q: In an organism with a haploid number of 7, how many possible combinations of maternal and paternal…
A: According to law to independent assortment :- Homologous chromosomes get arbitrarily mixed during…
Q: List down all the possible types of gametes produced by the following individuals with genotypes: а.…
A: The reproductive cells of an organism are called gametes. Additionally, they are referred to as sex…
Q: A diploid fruitfy has 8 chromosomes. How many total chromosomes would be found in the following…
A: Chromosomes are thread like structures located in nucleus of cells. It is made up of protein and DNA…
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Q: On average, what proportion of the genome in the following pairs of humans would be exactly the same…
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Q: Drosophila have XX/XY sex determination systems just like mammals. In Drosophila, loci for both eye…
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Q: Identify the sex of organism as male or female in which the sex chromosome are found as(i) ZW in…
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Q: Drosophila melanogaster has four pairs of chromosomes. Sperm for this species are formed by a…
A: The sex determination in drosophila melanogaster is determined by the XX-XO pattern in which the…
Q: The human contains 23 pairs of homologous chromosomes, all of which are indepently assorted. What do…
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Q: how many sex chromosomes are in a human gamete? A-five B- four C- one D- two E- three
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A: Introduction : The number of gametes formed is determined by the number of heterozygous alleles…
Q: Crossing-over does not occur between any pair of homologous chromosomes during meiosis in male…
A: During meiosis, crossing over allows recombination of genes between homologous chromosomes. Based on…
Q: Which of the following is the genotype for a female with a yellow body and red eyes, who is…
A: Alleles are the different forms of a gene. The genotype of two same alleles is called homozygous…
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A: BASIC INFORMATION CELL It is considered as the basic unit of life Every organism is made up of cell…
Q: A cross is made between a white-eyed female fruit fly and a redeyed male. What would be the…
A: Introduction Reciprocal cross: is a breeding technique which helps us in finding the inheritance…
Q: Using Drosophila notation: A.) Diagram the genotype of a female fly that is recessive for apterus…
A: Homozygous means both the alleles will be same and heterozygous means both the alleles will be…
Q: A homozygous gray female is crossed with a yellow male. The F1 are intercrossed to produce the F2.…
A: It is given that a homozygous gray female is crossed with the yellow male. The yellow color due to…
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: In organisms with the ZZ-ZW sex-determining system, from which of the following possibilities can a…
A: Introduction: In ZZ-ZW system of sex determination, female carries two different gametes i.e., ZW…
Q: A normal female Drosophila produces abnormal eggs that contain all (a complete diploid set) of her…
A: Although the two mammals and fruit flies produce XX females and XY male, their chromosomes…
Q: A male Drosophila melanogaster has the genotype A/a; B/b; C/c; XD/Y (all genes are on separate…
A: The genotype of a species is its heritable, complete set of genes that are transferred from one…
Q: A white-eyed (X-linked recessive character) female fruit fly is mated to a red-eyed male.…
A: Drosophila is one of the most important creatures in biology, especially genetics and developmental…
Q: What would be the sex of a human with each of the following setsof sex chromosomes?A. XXX C. XYYB. X…
A: BASIC INFORMATION Humans have 23 pairs of chromosomes out of which 44 are autosomes and 2 are sex…
Q: What does the sex chromosome genotype XO produce in humans?
A: Step 1 Allosomic genetic determination of sex is determined by distinct chromosomes called sex…
Q: A sexually reproducing animal has two genes that assort independently, one for head shape (H) and…
A: Meiosis occurs in sexually reproducing cells to produces gametes . Meiosis produces genetic…
Q: Normal male grasshoppers have no sex chromosomes. True or False
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Q: In Drosophila melanogaster, a normal individual has 8 chromosomes. The species is diploid, having…
A: Euploidy and aneuploidy are two types of chromosome variations that occur during the formation of…
Q: A fruit fly (Drosophila spp.) has 4 homologous chromosome pairs. What is its diploid number? 16 8 O4…
A: Genetics is the branch of biology that deals with the study of genes, their variation, and heredity…
Q: In fruit flies, sex is determined by the ratio of X chromosomes to autosomes. What would be the…
A: Drosophila has XY chromosomes as sex chromosomes in males and XX in females.
Q: Diagram the cross: a male fly expressing white (w) on the x chromosome, vestigial wings (vg) on…
A: X-linked traits in drosophila: Insects, similar to humans follow only an XY sex-determination in…
Q: On average, what proportion of the genome in the following pairs of humans would be exactly the same…
A: Crossing over takes place when the chromosomal homologs swap information during the metaphase of…
Q: Fruit flies (Drosophila) were mated. Cross #1 - 2 male red eyes (se+), wild wings(ap+) X 4 female…
A: Introduction: Dihybrid cross is referred to as crossing between two individuals who differ only in…
Name one trait each in humans & in drosophila whose genes are located on sex chromosome.
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- Which sex chromosome (X or Y) carries the gene for eye color in Drosophila? Why?In Drosophila virilis, somatic cell nuclei contain 12 chromosomes while sperm nuclei contain only 6 chromosomes. How many chromosomes present at metaphase I? 3 12 24Drosophila 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 8
- 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.In drosophila melonegaster, nuclei of somatic cells contain 8 chromosomes while nuclei of sperm cells contain only 4 chromosomes. What does "n" equal for this species? O 2 4 8. O 16You are an allele on a single uncondensed chromosome in a Yellowfever-carrying mosquito (Aedes aegypti) diploid cell (2n = 6). Demonstrate in as much detail as possible (1) how you will get to each genetically identical diploid cell of the multicellular offspring; (2) how you will get to the next generation of sexually reproduced progeny. Help, I no understand. Perhaps you will?
- If red vizcacha rats (Tympanoctomys barrerae) have 100 autosomes and 2 sex chromosomes in each of their diploid somatic cells, then they must have: only 102 chromosomes in their haploid germ cells only 100 chromosomes in their haploid germ cells only 52 chromosomes in their haploid germ cells only 51 chromosomes in their haploid germ cells only 50 chromosomes in their haploid germ cellsIn humans, males are heterogametic and females are homogametic, Explain. Are there any examples where males are homogametic and females are heterogametic? Also describe as to, who determines the sex of an unborn child? Mention whether temperature has a role in sex determination.Shown (the picture) is a partial gene map for Drosophila melanogaster. In Drosophila, vermillion eyes are recessive (v) to red eyes (V) and the gene resides on chromosome 1; dumpy wings (d) are recessive to normal wings (D); and speckled body (s) is recessive to normal body (S). The dumpy wing gene and the speckle body gene are linked on chromosome 2 and have 7 map units separating them. Assume that chromosome 1 and 2 are autosomal chromosomes and that there are no known interactions between the genes. In an experiment, an undergraduate student crossed pure breeding males that have red eyes, normal wings, and normal body with pure breeding females who have vermillion eyes, dumpy wings, and speckle body to obtain an F1. Using the Drosophila gene map, answer the following questions: a. What fraction of the F1 gametes will contain the alleles for red eyes, normal wings and speckle body? b. In a cross between an F1 flies and a tester, what fraction of the offspring do you expect to have…
- How many chromosomes does Drosophila melanogaster have?One reason that worker bees forgo their own reproduction to help their sister (the queen) reproduce is that female bees are more closely related to their sisters than they are to their own offspring. This quirk of genetics results from the fact that bees have haplodiploid sex determination, in which females are diploid, with a mother and a father, but males are haploid, developing from unfertilized eggs. Because males are haploid, they produce sperm by mitosis. Explainwhy haplodiploid sex determination causes females to be more closely related to their sisters than to their offspring.In Drosophila melanogaster, a normal individual has 8 chromosomes. The species is diploid, having two sets of 4 chromosomes each. on rare occasions, an abnormal fruit fly can be produced with 12 chromosomes, having three sets of 4 chromosomes each. True/False: Such a fly is euploid. True False