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a+, b+, c+ and d+ are independently assorting Mendelian genes controlling the production of a black pigment. The alternate alleles that give abnormal functioning of these genes are a, b, c, and d. A black individual of genotype a+/a+ b+/b+ c+/c+ d+/d+ is crossed with a colorless individual of genotype a/a b/b c/c d/d to produce a black F1. F1 x F1 crosses are then done. Assume that a+, b+, c+ and d+ act in a pathway as follows: colorless --a+--> colorless --b+--> colorless --c+--> brown --d+-->black.
a. what proportion of the F2 generation will be colorless?
b. what proportion of the F2 generation will be black?
c. what proportion of the F2 generation will be brown?
For which molecules and ions does your experiment give evidence for passage through the semipermeable dialysos membrane? in which direction(into or out of the bag) are the molecules moving?
Represent graphically the relation between melting temperature and the G-C content of DNA. Construct relations for dependence of melting temperature of a 30 bp DNA duplex on the G-C content.
In a study of intraspecific aggression, an experimenter finds that sixteen out of 23 animals tested in species A exhibit aggression,
Explain two processes that ensure that your full future sibling is going to be genetically different from you even though you have the same parents.
Create a model that would permit the attenuation region to no longer be involved in binding ribosomes and synthesizing leader peptides after the attenuation decision is made.
As we know that mean arterial blood pressure = CO cardiac output x total peripheral resistance (TPR), what might be a normal mechanism to compensate for elevated blood pressure?
Artificial electron acceptors can also be used to notice a specific organelle in animal cells by cytochemistry. Name this organelle and outline a procedure that you will use to detect this organelle by cytochemistry.
If two chromosomes of a species are the same length and have a similar centromere placement but are not homologous, what is different about them.explain the concepts of homologous chromosome
According to our current knowledge of plant evolution, which group of organisms should feature mitosis most similar to that of land plants.
Action potentials are usually generated at axon hillock and propagated down axon away from the cell body. If you experimentally depolarized an axon to the threshold level at a point halfway down the axon, what would happen.
A section of the E. coli genome that encodes the pheM protein. Write out and label: the reverse complement, the mRNA sequence.
What is involved in going from genomic DNA to messenger RNA (mRNA)? The transciption process involves the concerted action of several proteins called transcription factors which method the DNA in a multi-step process into mRNA.
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