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Linked genes are 50 M.U.'s apart. You will not recover >50% recombinants. Why?
Here is the question:
If two genes are linked on a chromosome and over 50 map units apart, in theory you will not recover more than 50% recombinants, which is the same as independent assortment (genes on two different chromosomes). Using diagrams, show why this is so.
Indicate which allelic combinations each individual has
I know the answer already because the key was given but I don't know why the answer is what it is. I thought the progeny in generation III all had parental allelic combinations but that's not so. Why is that?
In Drosophila, four genes on the X chromosome are sites of recessive mutations causing yellow body (y), white eyes (w), miniature bristle (m), and small wings (sm). In a test cross of F1 triple heterozygous female (obtained by crossing two pure-breeding P1 stocks) with (m y w)/Y males, seven classes of progeny were recovered and counted among 400 F2 flies.
I can't figure out how to do the punnet square for any of this or what it all means? Can anyone please explain how to understand the solution? Looks like a bunch of letters and numbers to me.
Red-green color-blindness is an X-linked recessive trait in humans. Polydactyly (extra fingers and toes) is an autosomal dominant trait. Martha has normal fingers and toe
EMERGENCY: Need help with UMUC Lab # 5 Genetic Inheritance
Lab # 5 Genetic Inheritance
Section A: Patterns of Inheritance
Background Information In the 19th century, a monk named Gregor Mendel conducted a series of experiments to determine how ‘traits’ or features of pea plants were passed on from generation to generation. He carefully studied seven traits of successive generations of pea plants to disc
Indicate whether each of these is plesiomorphic (ancestral) or apomorphic (derived) in the great ape lineage, using the phylogeny below. Great apes include orangutan, gorilla, chimp, and human.
A scientist wanted to compare the evolution of the families Balaenopteridae (the rorqual baleen whales) and Delphinidae (the dolphins). Balenopteridae consist of about 11 species while Delphidae consist of about 41 species. The scientist proposes the hypothesis that evolution has occurred more rapidly in Delphinidae due to their active, predatory lifestyle, while the baleen whales,
1- Baur and Shull crossed broad-leaved females of the plant species Lychnis alba to narrow-leaved males and obtained an F1 consisting of males and females that were all broad leaved, but the F2 were of two kinds, broad-leaved and narrow-leaved. Explain the type of sex determination system that exists in Lychnias alba. SHOW YOUR WORK . a- Type of system? b- what
The first genomic library ever made was for the beta-globin gene taken from human genomic dna of the reticulocytes. the library was done by using a partial digestion of the genome via restriction enzymes. [ a partial digest is done by not allowing the reaction to go to completion achieved by limiting incubation time] the fragments were then transferred to vectors of
The first genomic library ever made was for the beta-globin gene taken from human genomic dna of the reticulocytes. the library was done by using a partial digestion of the genome via restriction enzymes. [ a partial digest is done by not allowing the reaction to go to completion achieved by limiting incubation time] the fragments were then transferred to vectors of
Two theoretical genetic strains of a virus (a − b − c − and a + b + c +) were used to simultaneously infect a culture of host bacteria. Of 10,000 plaques scored, the following genotypes were observed. Determine the genetic map of these three genes on the viral chromosome. Decide whether interference was positive or negative. a+b+c- 41000
In a transformation experiment, donor DNA was obtained from a prototroph bacterial strain (a + b + c +), and the recipient was a triple auxotroph (a − b − c −). What general conclusions can you draw about the linkage relationships among the three genes from the following transformant classes that were recovered? a+ b- c- 180 a- b
One result of X-linkage is a crisscross pattern of inheritance in which
One result of X-linkage is a crisscross pattern of inheritance in which sons express recessive genes of their fathers and daughters express recessive genes of their mothers.
a. True b. False
False, One result of X-linkage is a crisscross pattern of inheritance in which sons express recessi
Creation of CFTR Knockout Embryonic Stem Cells by Positive-Negative Selection
I am having trouble understanding what is going on here. What I got thus far is that the more preferred fate is Homologous recombination (targeted approach). Next, you basically plate the ES cells that are both neomycin & ganciclovir resistant (homologous recombination). I basically do not know if I am on the right track. Any feedback of any sort will help.
translate this into protein using the genetic code table.
Below is a sequence of double stranded DNA from a bacterium. Based on what you know about bacterial transcription and translation, put an “X” next to the strand that is most likely to be the template strand for transcription and give a brief answer for your choice (5-10 words). Then, • clearly underline the likely coding sequence • transcribe it into mRNA
Is it possible to calculate the relatedness between family members(consanguineous) if you have the genotypes at all positions on te chromosomes.
Let me try to explain what I'm doing now:
A person can have 3 types of genotypes for example AA, BB and AB. If you combine 2 persons you will get a total of 9 different types of combinations.(AAAA,BBBB,ABAB,AAAB,B
Hi I'm currently taking genetics at my school and the section on haploid genetics (i.e. Neurospora) has me dazed. Can anyone explain clearly how tetrad analyis works, what PD,NPD,T all represent and how they all come together in the so-called Perkin's formula? (the derivation) Thanks!
I'm having problems figuring out the logic behind two formulas related to the Hardy-Weinberg equation. Here are two relevant excerpts from my textbook, Medical Gentics by Jorde, Carey and Bamshad:
Quote
Consider, for example, a dominant disease that results in death before the person can reproduce. This is termed a genetic lethal mutation because, even though t
The accuracy of reporter assays can be improved by utilizing a dual reporter system. One of the reporter genes is correlated with the promoter of interest and is used to assess the effects of specific experimental conditions, while the second reporter is used as a control and serves as a baseline response. The Super Light™ Dual- Luciferase Reporter Assay allows for the sequential me
A mutation in which gene could be responsible for this biosynthetic auxotroph
One of my mutants [EMS-mutagenized, ampicillin enriched, 99.9% killing] grew only [! only] on a plate containing arginine, aspartate, proline, glutamic acid, inositol, and ornithine. I've spent hours trying to find out where the mutation might be [i have found out how all the amino acids on the plate are related using ecocyc], but i can't pinpoint an intermediate that woul
here is the data, i figured out that there is three overlaps in the Hind3 and EcoR1 at the 21200 and the 350 mark and the 2700 mark. that means it was cut twice? but after that i dont know where to go.
The question asks to calculate the tandem repeats in the D1S80 allele. i plotted the graph but im not sure what to do from there. next question asks to be figure outhow many diffferent classes of homozygous and heterozygous exist? any help will be greatly appreciated
help analyzing this paragraph from journal article
In this journal "Evolutionary History and Adaptation from High-Coverage Whole-Genome Sequences of Diverse African Hunter Gatherers" by Lachance et. al , I am having a hard time trying to figure out what this certain section is saying.
Under "Evidence of Archaic Introgression" - We didn't find strong evidence that introgressed regions were clustere
Theodore was a highly inbred handsome rat with a very long tail (30 cm), while his equally inbred yet striking mate, Spacey, had a petite tail (6 cm). When Theodor and Spacey had their first litter, all had 18-cm tails. When the babies grew up and interbred, they produced 256 F2’s with tails ranging in size from 6 cm to 30 cm in the following intervals: 6, 10, 14, 18,
A few doubts regarding Heart (Atrial) Embryology...
HI GUYS
1. What is the developmental significance of both the Atrial appendages, i.e. what is the reason for their presence? What I mean is, is it just to increase its volume as man has more oxygen and nutritional requirements all of a sudden in the developmental tree or what?
2. Why does septum spurium develop at all? It anyways is incorporat
