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Question: Assume you recently found a new variety of sweet pea plants in the area surrounding Chernobyl that cannot be crossed with the sweet pea plants used in Mendel's experiments. You identify several pure breeding strains with characteristics that are similar to those described by Mendel. You found that round (R) was dominant over wrinkled (r) for pea shape and yellow (Y) was dominant over green (y) for pea colour in monohybrid crosses.
(a) show the expected outcome of a dihybrid cross starting with pure breeding plants with round yellow peas and pure-breeding wrinkled green peas. Include all phenotypes and the corresponding genotypes for parental, F1 and F2 generations. Also include the expected phenotypic ratios for the F2 generation. Surprisingly, when you performed this cross, you notice some interesting differences from Mendel's experiments. Although all F1 progeny had round yellow peas, the F1 self cross resulted in far fewer round green and wrinkled yellow peas than expected. Being very clever, you hypothesize that these loci may be linked in this variety of pea and you performed a testcross between F1 plants and double homozygous plants with wrinkled green peas. You obtained the following progeny: 445 Round yellow, 48 round green, 52 wrinkled yellow and 455 wrinkled green. (b) Identify the parental and recombinant classes from the test cross (2 marks). (c) Estimate the recombination frequency using these data, and show your work. (d) Indicate the distance between loci in map units, and show your work. (e) Using the recombination frequency you calculated in (c), predict the phenotypic ratio in the F2 generation in the dihybrid cross in (a)
The body temperature in humans is maintained about the 37 C. Which characteristic of life does this statement represent? Living things respond to stimuli. Living things are homeostatic.
Read over the description of the Human Inherited Traits in the Week 6 Experiment instructions in our course and complete the table given below.
What attributes must these alleles possess for them still to be present. How must the interests of competing groups be balanced.
Trypanosomses are not so young and widespread protozoa that humans have encountered for many years. Upon infection with T. brucei brucei, the organism is cleared.
Describe these results by explaining how and why the introns are eliminated and proved the genotypes of Mini, Mickey and Timmy, and their children.
A dihybrid cross of two plants is done and the seed pod shape is examined
One way of expressing rate at which enzyme can catalyze a reaction is to give turnover number. The turnover number is maximum number of substrate molecules that can be acted on one molecule of enzyme per unit of time.
What kind of approach is this alien taking to learn about the car? An alien from a new planet landed on earth. He is attentive by cars and is determined to figure out how they work.
Write down an equation for the complete oxidation of glucose. What does this imply about the volume changes you would view if you simply sealed the pea seeds in a flask.
If we ignore the possibility of crossing over, how many different combinations of chromosomes are probable in gametes of a single human.
What are the characteristics of life? There are some things, like planets, stars, viruses and prions that have many of the characteristics of life, but are not alive.
Discuss these two laws of Thermodynamics and how they relate to the Law of Conservation of Matter. Which of the next may be the path of a protein from the site where its polypeptides are made to its export.
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