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Embryonic pattern specification during development in some cases requires maternally contributed ‘determinants', and in others is regulated by signaling between cells. For each of the following developmental events, indicate whether it is primarily maternally contributed determinants or instead local interactions between cells that is most important. In addition, name one important gene involved in each process.
(a) Germ cell specification in Drosophila
(b) Neural Crest Cell specification in vertebrates
(c) Anterior/Posterior border specification in Drosophila wing imaginal disk
Explain how CO2 enters leaves. What environmental factors control stomatal movement? How are these factors related to physical and chemical properties that control the opening and closing of stomata
Compare the utility of APD, and NADPH, generated by photosynthesis, in terms of the Calvin Cycle.
In Drosophila melanogaster, a gene "ebony" produces a dark body colour when homozygous, and an independently assorting gene "black" has a similar effect (that is the black and ebony body colours are indistinguishable).
Generally we think of DNA as information storing molecules. What other molecules can serve to provide information and give an example.
Define neurotransmitters and describe their role in neurotransmission. Discuss how they are released, how they affect receiving neurons, and how they are removed from receptor sites.
For this exercise you were given known phenylalanine deaminase positive and phenylalanine deaminase negative culture. what is the purpose of the uninoculated control? What other types of controls would be useful to increase reliability of the test..
The pedigree below traces the inheritance of alkaptonuria, a biochemical disorder. Affected individuals, indicated here by the filled-in circles and squares, are unable to break down a substance called alkapton, which colors the urine and stains b..
Name an example of a red blood cell membrane protein that carries out each function of that you gave in part (a) of this question.
In humans, ABO blood groups are determined by three alleles: alleles IA and IB are codominant and both are dominant to the third allele i. MN blood groups are determined by two codominant alleles M and N.
What is the benefits of breastfeeding
Utilize darwin's theory of evolution by natural selection to explain how a group of ancient mammals couple be the ancestors of a major new group of mammals, the cetaceans.
How do the electron acceptors used in fermentation differ from the terminal electron acceptors used during aerobic respiration and anaerobic respiration?
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