In Drosophila, a heterozygous female for the X-linkedrecessive traits a, b, and c was crossed to a male that phenotypically expressed a, b, and c. The offspring occurred inthe following phenotypic ratios.+  b  c                            460a  +  +                           450a  b  c                              32+ + +                              38a  + c                              11+ b +                               9 No other phenotypes were observed.(a) What progeny phenotypes are missing? Why?

Q: One of the X chromosomes in a particular Drosophila female had a normal order of genes but carried…

A: Crossing over: It occurs during prophase I and involves the exchange of genetic material between…

Q: In Drosophila, the sepia mutation (se, chromosome 3, position 26) results in dark brown eyes, while…

A: Introduction :- D. melanogaster is an ideal model organism due to a variety of characteristics. The…

Q: In fruit flies, the autosomal recessive mutation pr causes brown eyes whereas the cn mutation causes…

A: A genetic characteristic or disease can be handed down from one parent to the next through autosomal…

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: A cross in Drosophila melanogaster involved the recessive X-linked genes for white eye (w), yellow…

A: The genotype expressed by most number of offspring is the parental genotype. Here, + y + and w + ct…

Q: In a species of rat, the map unit distance between genes A, B, C and D were as follows: (in the…

A: There are 4 genes : A , B , C , D in the species of rat. Basically ,  Map unit or m.u or cM is the…

Q: A Drosophila embryo dies during early embryogenesis due to arecessive allele of a maternal effect…

A: Phenotypes and genotypes represents the traits that gets passed on from the parents to the progeny.…

Q: In the experiment of Figure shown, Stern followed the inheritancepattern in which females carried…

A: Step 1 Sex linkage is a linked group of genes found along with sex controlling genes as present on…

Q: were observed and used to make a map of these genes.  Calculate the interference.…

A: Answer. The linkage of the genes in a chromosome can be in the form of a genetic map or linkage map.…

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: A (Only zygotes with balanced genomes will survive to adulthood. What proportion of F1 zygotes have…

A: A unique organism with an intriguing genetic configuration evolved from a population of Drosophila…

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: Identify the components of the expression 2n=46. the number of chromosomes in one full parental set…

A: Chromosomes are long, thin, thread-like structures made up of DNA and protein that carry the genetic…

Q: In Drosophila, M. Green found a singed allele (sn) withsome unusual characteristics. Females…

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A: A dihybrid cross is a type of genetic experiment where two different traits are studied to…

Q: The phenotype of vestigial (short) wings (vg) in Drosophila melanogaster is caused by a recessive…

A: It is given that the vestigial wing and hairy body are caused by recessive wings. These are encoded…

Q: One of the X chromosomes in a particular Drosophila female had a normal order of genes but carried…

A: Inversion usually occurs in the prophase 1 in which two break can occur in the area and can thus…

Q: Cinnabar eyes (cn) and reduced bristles (rd) are linked autosomal recesive characters in Drosophila…

A: According to the question, The given cross is, cn+cn+rd+rd+ (wild type female) X   cncnrdrd (reduced…

Q: In rice, male sterility is controlled by maternal cytoplasmic elements. This phenotype renders the…

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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: 4. Suppose that a parent Drosophila is e ca* e ca The gamete frequency is as follows: e'ca e'ca e ca…

A: The gamete which contains a new combination of alleles as compared to its parent is known as a…

Q: A XY individuals transcribe the Sxl gene early but not late. B XX individuals carry the Sxl gene, XY…

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Q: It is assumed that in Drosophila the following genotypes produce phenotypes. َA- B- = Red color A-…

A: Genetics may be a discipline of biology concerned with the study of genes, genetic diversity, and…

Q: h se g. +se+ + se g. ++g. h se + + + + h+g. h++ TOTAL Oh; 16.4 O se; 7.1 is the gene in the middle…

A: Genetic linkage is the tendency for genes located close to each other on the same chromosome to be…

Q: A Drosophila strain with two mutated phenotypes was crossed with a wild-type Drosophila strain. The…

A: Law of independent assortment state that two different allele assorts independent from one other.…

Q: In Drosophila, the wildtype eye color is black. In the laboratory, you screened for mutants than…

A: Based on the information provided, the most likely conclusion is:E. The two mutations complemented,…

Q: In Drosophila, a female fly is heterozygous for three mutations, Bar eyes (B), miniature wings (m),…

A: In terms of genetics and genomics, linkage describes how closely genes or other DNA sequences are…

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

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Q: A blue eyed agouti hair male mouse is mated to a brown eyed yellow haired female mouse, and a test…

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Q: You are studying tail length in a species of mice, where some mice have long tails and some have…

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Q: The orange coat color allele in cats is located on the X chromosome and is one of two genes…

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Q: the white-eyed w+ gene from one end of the X chromosome locus (w) moves the to a location nearer to…

A: This is an example of epigenetic modification. It alters the gene expression pattern.

Q: Female flies with white eyes and miniature wings (both X-linkedrecessive traits) were crossed to…

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Q: Members of a family are affected by a Oco-dominance hereditary inflammatory and Odominant negative…

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Q: Black body (b) and purple eye (pr) are recessive autosomal mutations in Drosophila. Bridges are…

A: b - allele for black body - recessive pr - allele for purple eye - recessive B - wild type for body…

Q: Deduce the phenotypic proportions in the progeny of thefollowing crosses of autotetraploids in which…

A: Phenotypic proportion shows the ratio of offspring's combination genes and these are similar in the…

Q: Male Drosophila from a true-breeding wild-type stock were irradiated with X-rays and then mated with…

A: J. Muller first showed in his experiment that exposure to certain dose of X-rays higher than the…

Q: What is the major mechanism of injury with drowning?

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Q: 1 II 1 2 a) Assume that colour is controlled by a single sex-influenced gene where green is…

A: a- In second generation female (1) would be red . b- due to cytoplasmic inheritance both would be of…