A dominant gene, b+, is responsible for the wild-type body color of Drosophila. It’s recessive allele, b, produces black body color. A testcross of a wild-type female produced 52 black flies and 58 wild-type flies in the F1 generation.
a. What are the genotypes of the parents?
b. What are the genotypes of the F1 generation?
c. If the wild-type F1 females are crossed with their black F1 brothers, what genotypic and phenotypic ratios would be expected in their F2 offspring?
In: Biology
What do we do with native species that are also invasive?
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How can treatment with one antibiotic select for resistance to a different antibiotic and what is the clinical significance of this?
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Explain why chemogenetic based methods of regulating cellular signaling result in poor temporal control of biochemical pathways relative to optogenetic based methods.
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Part 1: evolutionary speaking with respect to life-history traits of longevity and reproductive, what do bats, seals, and tsetse flies have in common (what factors have favored the evolution of long life)?
part 2: what are 3 life-history traits of mayflies that are required for their very short adult lives?
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Question 1
How could you identify bacteria in a biofilm if it could not be cultured?
Question 2
How can bacteria produce or modify enzymes to control how much metabolic product is made?
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What is the expected phenotypic ratio for a cross between two individuals that are heterozygous for a given trait? Use one of Mendel's pea plant traits as an example.
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Please describe four essential components of TGFb signaling pathway in terms of gene name and function under normal and cancer conditions as a table summary
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Regulation of gene expression occurs primarily at the level of transcription. What would be different if cells controlled gene expression primarily at the level of translation?
| a. |
The ability to rapidly respond to environmental change would be reduced. |
|
| b. |
Genes would no longer be transcribed efficiently. |
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| c. |
Cells would expend significantly more energy. |
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| d. |
Many different protein isoforms would be produced. |
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| e. |
Translation of mRNA would not occur. |
If an enhancer associated with a gene was deleted or mutated, what would be the effect on levels of gene expression?
| a. |
Gene expression would be reduced or not occur at the appropriate time. |
|
| b. |
The gene would not be recognized by RNA polymerase. |
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| c. |
Gene expression would not occur at all. |
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| d. |
Gene expression would increase or occur at the inappropriate time. |
Cells regulate gene expression at the level of translation by:
| a. |
controlling ribosome binding at the 5' end of mRNA. |
|
| b. |
controlling the length of the polyA tail. |
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| c. |
controlling the amount of amino acids used. |
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| d. |
a and b |
|
| e. |
a, b and c |
|
| f. |
a and c |
In: Biology
In: Biology
hat is the relationship between diabetes, glucose in food, saliva, microvilli, blood transport of glucose, beta cells of pancreas, diabetes- elevated blood glucose, glomerulus, glucose in urine? Major emphasis on RELATIONSHIP
In: Biology
In: Biology
A 6month infant has hepatosplenomegaly, failure to
thrive, musclc weakncss, hypotonia, decreased deep tendon reflex.
Lab result.normal blood glucose. Liver biopsy:(+) initial stage of
cirrhosis due to
accumulation of an abnormal glycogen that has few branchpoints.
Clinical picture and labs are consistent with which type of
glycogen storage discasc (GSD)? explain the reason also
In: Biology
. 6.What is agglutination?
7. What is agglutinogen?
8. What are the preformed antibodies in human blood?
9. Which antibody in the blood is formed after exposure to antigen?
10. What is its consequences?
In: Biology
In: Biology