Homework Answers
E.coli have higher gene density than all of the above organism because they contain around 500-1000 genes per million of base pairs which is to much higher than any others.
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You calculated the gene density for the chromosomes of the bacterial species E.coli, the fruit fly...
There are three genes that you are tracking on a fruit fly: Gene ‘r’ that...
There are three genes that you are tracking on a fruit fly: Gene ‘r’ that results in the phenotype of red body colour Gene ‘t’ for the phenotype of transparent wings Gene ‘b’ for the phenotype of black coloured eyes. You cross breed fruit flies with the above mentioned genes and observe the following: When red body fruit flies are cross bred with transparent winged fruit flies, 2400 offspring were produced. Out of the 2400 offspring,...
Assortment of genes on same chromosome In the fruit fly Drosophila, there is a dominant gene...
Assortment of genes on same chromosome In the fruit fly Drosophila, there is a dominant gene for normal wings and its recessive allele for vestigial wings. At another gene locus. there is a dominant gene for red eyes and its recessive allele for purple eyes. A female that was heterozygous at both gene loci was mated with a male that is homozygous for both recessive alleles. Knowing this, complete the sentences with the correct terms. 94% crossing over independent assortment...
6. In Cross 1, a yellow eyed, long wing fruit fly from a pure breeding strain...
6. In Cross 1, a yellow eyed, long wing fruit fly from a pure breeding strain is mated to a red eye, short wing fruit fly from a pure breeding strain. All of their offspring (F1) had red eyes and long wings. In Cross 2, one of the F1 offspring is mated to a fly with yellow eyes and short wings, and this cross gave the following F2 population: 194 flies with long wings and red eyes, 796 flies with...
ΦC31 is a type of bacteriophage that infects Streptomyces bacteria. One gene in the bacteriophage genome...
ΦC31 is a type of bacteriophage that infects Streptomyces bacteria. One gene in the bacteriophage genome specifies a recombinase called ΦC31 integrase that works through a mechanism slightly different from that of the recombinase shown in Fig. 6.30. Most importantly, the two target DNA sequences are different from each other. One called attP is 39 base pairs and is found on the circular bacteriophage chromosome, while the other—attB—is 34 base pairs long and is located on the much larger circular...
the fruit fly, Drosophila melanogaster, an allele (v) of the gene vermillion gives flies purple eyes...
the fruit fly, Drosophila melanogaster, an allele (v) of the gene vermillion gives flies purple eyes and is recessive to the wildtype red eye color (v+). An allele y of the yellow gene, gives flies a yellow body color compared to the dominant brown body color (yt). A heterozygous females for the two different mutations is test-crossed with mutant (i.e., homozygous recessive) males. The phenotypes of the progeny of this cross and their corresponding numbers are given below Yellow body,...
16. Use the following information to answer the questions below. Drosophila (fruit flies) usually have long...
16. Use the following information to answer the questions below. Drosophila (fruit flies) usually have long wings (+) but mutations in two different genes can result in bent wings (bt) or vestigial wings (vg). If a homozygous bent wing fly is mated with a homozygous vestigial wing fly, which of the following offspring would you expect? a. 1/2 bent and vestigial to 1/2 normal b. 1/2 bent and 1/2 vestigial flies c. 3/4 bent to 1/4 vestigial ratio d. all...
You are attempting to annotate a segment of a new fruit fly genome. You find that...
You are attempting to annotate a segment of a new fruit fly genome. You find that when the new genome segment is translated it matches a D. melanogaster protein with high number of identical amino acids found in the two species. However, you notice that the translation of the new genome segment results in multiple stop codons in the region that matches D. melanogaster. Given this observation, this gene might be a Paralog Dialogue Pseudogene Unrelated gene 08
Drosophila melanogaster, the fruit fly, has a 2n chromosome number of 8 (4 chromosomes – 3...
Drosophila melanogaster, the fruit fly, has a 2n chromosome number of 8 (4 chromosomes – 3 autosomes and 1 sex chromosome). Assume that you are microscopically examining the mitotic and meiotic cells of this organism. You note that in the female, two chromosomal pairs are metacentric and two pairs are acrocentric. Draw the chromosomal configurations as you would expect to see them at the stages listed: i. mitotic metaphase ii. primary oocyte (meiotic metaphase I) iii. secondary oocyte (meiotic metaphase...
word bank: animals/ bacteria/ centromeres /circular /euchromatin /fungi /heterochomatin / gene density / gene size /...
word bank: animals/ bacteria/ centromeres /circular /euchromatin /fungi /heterochomatin / gene density / gene size / genome size / linear /LINEs / LTR elements / microsatellites / p / plants / q / SINEs / telomeres /virus QUESTION 1 Which organism have the smallest size (fewest basepairs) of genome? QUESTION 2 Which organisms can have the largest size (most basepairs) of genome? QUESTION 3 The majority of bacterial genome are stored on a ________ chromosome. QUESTION 4 All eukaryotic genomes...
You identify a gene (gene 1) in once species (species 1) that shares significant homology to...
You identify a gene (gene 1) in once species (species 1) that shares significant homology to a gene (gene 2) in a second species (species 2). Species 1 and species 2 share a common ancestor. Gene 1 and Gene 2 lie within in blocks of sequences that show synteny between the two species. You determine the number and identity of synonymous and non-synonymous sequence changes in the coding sequences when comparing the two genes. From these data alone (i.e., without...
Assortment of genes on same chromosome In the fruit fly Drosophila, there is a dominant gene for normal wings and its recessive allele for vestigial wings. At another gene locus. there is a dominant gene for red eyes and its recessive allele for purple eyes. A female that was heterozygous at both gene loci was mated with a male that is homozygous for both recessive alleles. Knowing this, complete the sentences with the correct terms. 94% crossing over independent assortment...
6. In Cross 1, a yellow eyed, long wing fruit fly from a pure breeding strain is mated to a red eye, short wing fruit fly from a pure breeding strain. All of their offspring (F1) had red eyes and long wings. In Cross 2, one of the F1 offspring is mated to a fly with yellow eyes and short wings, and this cross gave the following F2 population: 194 flies with long wings and red eyes, 796 flies with...
the fruit fly, Drosophila melanogaster, an allele (v) of the gene vermillion gives flies purple eyes and is recessive to the wildtype red eye color (v+). An allele y of the yellow gene, gives flies a yellow body color compared to the dominant brown body color (yt). A heterozygous females for the two different mutations is test-crossed with mutant (i.e., homozygous recessive) males. The phenotypes of the progeny of this cross and their corresponding numbers are given below Yellow body,...
You are attempting to annotate a segment of a new fruit fly genome. You find that when the new genome segment is translated it matches a D. melanogaster protein with high number of identical amino acids found in the two species. However, you notice that the translation of the new genome segment results in multiple stop codons in the region that matches D. melanogaster. Given this observation, this gene might be a Paralog Dialogue Pseudogene Unrelated gene 08
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