Why don't all x-linked genes demonstrate the gene dosage effect? Answer in terms of protein levels...
Why don't all x-linked genes demonstrate the gene dosage effect?
Answer in terms of protein levels / activity / function in Drosophila.
Homework Answers
Answer:
- Dosage compensation- it is phenomenon in which the expression of genes in case of most of the X-linked genes is not variable between the “homozygous females and hemizygous males”.
- Mostly, X-linked alleles demonstrate “dosage compensation”.
- In context of protein functioning, dosage compensation is the phenomenon wherein the the levels of protein expression from hemizygous genes present on X chromsomes are same as that of XX female.
- In certain cases of Drosophila, it can be seen that the “gene dosage effect” wherein number of copies of X-linked allele affects the phenotype of allele.
- And more the copies of allele greater will be the intensity of phenotype.
- The amount of protein directly influences the phenotype.
- In case of Drosophila, the expression X-linked genes in males are mostly upregulated in comparison to the females having two X chromosomes.
- It occurs so that the expression of genes in males is same as that in females. In mammals like humans, this compensation occurs by X-inactivation that is inactivation of one of the X chromosomes.
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Why don't all x-linked genes demonstrate the gene dosage
effect?
Answer in terms of protein levels...
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My uni gave me this table below but I don't know why the answer
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19. Which of the following statements regarding dosage compensation is TRUE? i) In Drosophila gene expression is increased from a single X chromosome. ii) In Drosophila gene expression is increased from a pair of X chromosomes. iii) In C. elegans gene expression is reduced from a pair of X chromosomes. iv) In C. elegans gene expression is increased from a pair of X chromosomes. A) i and iii B) ii and iv C) All...
Please answer this carefully Xd
In Drosophila, the genes y, f, and vare all X-linked. Females who are homozygous for recessive alleles of all three genes (y fv/y fv) are crossed to wild-type males. The resulting trihybrid F1 females are testcrossed. Answer questions a, b and c. The F2 are distributed as follows: vfv3210 ly fyt 1024 678 690 1044 601 V + + 3222 10,000 (3)_ _and__ (4)_ a. The F2 progeny that have the parental genotypes are: _(1)__and__(2)...
Which one or more of the four hierarchical levels of protein
structure is/are always lost during protein denaturation?
* I know the answer is tertiary but want to know why?
My uni gave me this table below but I don't know why the answer
is then teriary(they gave this answer). Can someone please
explain.
*
On what structural features does the catalytic activity of an enzyme depend? (1) Definition:"Enzyme denaturation" loss of enzyme structure, (almost) always with loss of biological...
Genetics Worksheet Week 3: Gene Regulation and Epigenetics 1. Duchenne muscular dystrophy is caused by a mutation in a gene that is 2.5 million nucleotides in length and encodes a protein called dystrophin. The dystrophin protein itself is 3684 amino acids in length. Calculate below the approximate size of the mRNA that encodes dystrophin. Approximately what percentage of the gene that encodes dystrophin is intron sequence? The human genome encodes a much greater variety and number of proteins than the...
please help with parts a-g
4. In Drosophila, the genes y, f, and v are all X-linked. y fv females are crossed to wild-type males and the F, females are test-crossed. The F2 males are distributed as follows: Phenotype Number 3210 72 1024 678 690 1044 60 3222 10,000 Give the genotype of the F1 females that gave rise to these progeny to show linkage phase? (2 points) A. 8. Which phenotypic classes are the parental types? (2 points) C....
3. (2 points) In the nematode roundworm, Caenorhabditis elegans, the LIN-14 protein controls the timing of certain cell divisions during development. LIN-14 protein levels are normally high in early development but decrease in the later stages. In a lin-4 mutant, the level of LIN-14 protein stays high throughout development, changing the pattern of cell divisions in the animal and producing defects in the shape of the animal. The lin-4 gene encodes a microRNA that binds to a sequence in the...
A cross in Drosophila involved the recessive, X-linked genes yellow (y), white (w), and cut (ch. A yellow-bodied, white-eyed female with normal wings was crossed to a male whose eyes and body were normal but whose wings were cut . The F, females were wild type for all three traits. • The F, males expressed the yellow-body and white-eye traits. The cross was carried to an F2 progeny, and only male offspring were tallied. On the basis of the data...
Please have a different answer than the other post, and use
layman's terms as well
hhmi Biolnteractive Using CRISPR to identify the Functions of Butterfly Genes Activity Student Handout This document is made available by the Howard Hughes Medical Institute. Using this document, you agree to use this document in accordance with the Terms of Use. INTRODUCTION Scientists have determined the complete DNA sequences of the genomes for many organisms, including humans. By analyzing patterns in those sequences, they can...
Please answer 2-5
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