All Questions
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Gene Mapping - Please explain in Lay terms
Taking an AP bio course, and for some reason I cannot comprehend the mechanism of how one determines the location of alleles on a chromosome. The math is simple and I can memorize it, but its bugging ...
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What is the most accurate polygenic score for Alzheimer’s disease?
To date, which polygenic score (i.e. which study) has produced the largest effect size for Alzheimer’s prediction in out-of-sample validation?
- 401
2
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3
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311
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What is the exact definition of a "gene"?
(In this question, I'm only considering the molecular-biology notion of a gene, not the older Mendelian notion.)
Wikipedia defines a "gene" as "a sequence of nucleotides in DNA that is ...
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2
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155
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What really is an allele?
My textbook says:
genes which code for a pair of contrasting traits are known as alleles.
Then that means T and t are alleles. Further, it says:
Mendel also proposed that in a true breeding, tall ...
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70
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Herbicide resistant crop plants
Consider the above multiple choice question. I can't seem to understand why the answer is B. How does genetically modifying the crop plant have any effect on the weeds?
The way I understand genetic ...
3
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2
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143
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Is there a risk that genetically modified organisms displace genes of other species via horizontal gene transfer?
It is known that species can rely on certain genes to survive. See for example this publication.
An argument often made by environmental groups is that genes introduced by genetically modified ...
- 543
2
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1
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565
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What is "Correlation of growth" according to Darwin and was he correct about it according to modern science?
What are the views that modern biologist have on Correlation of growth? I need some clarification on statement that I'm gonna mention below as well that is it reason to that as mentioned here: "...
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410
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Using the law of independent assortment, why can't heterozygous parents make identical twins?
In a case where two parents are heterozygous, why can't any pairs of their children be identical twins? As the question asks, I tried to explain this using the law of independent assortment, which ...
- 109
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131
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How many genes of an individual are homozygous?
We have 20000 to 25000 protein-coding genes. Considering an individual, how many of his\her protein-coding genes are homozygous? I am looking for an estimation of gene homozygosity ratio in human ...
- 2,274
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189
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Could someone explain how chromosomes are counted here?
I'm not sure how chromosomes are counted in this picture. I would reason that there would be 8 chromosomes in the diploid cell, but that doesn't seem to be the case. Could someone explain?
- 21
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3
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518
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Is it possible to fuse DNA from two sperms and can a baby be born from that? [closed]
If this is possible, then isn't there going to be a chance to have a YY child?
- 19
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81
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How often are diseases caused by more than a single mutation of a gene?
Many genetic diseases are caused by mutations in a gene and often, it is a single nucleotide polymorphism (SNP) that has dramatic consequences (e.g. the E6V hemoglobin mutation in sickle cell disease)....
- 109
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1
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77
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Is there any way siblings could be related more than 3/4th siblings, but less than full siblings?
I couldn’t find anything on Wikipedia. 3/4th siblings are 37.5% related while full siblings are 50% related. Is there anything in between?
- 135
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1
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What is targeted gene disruption?
I am a bit confused about what targeted gene disruption means. I was reading this article in which they compare the Pyrococcus Furiosus genome with a genetically tractable strain P. Furiosus variant ...
- 443
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1
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330
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What is the map unit between the genes?
While doing some biology I came across this question:
The following tables present results of plant crosses involving two linked genes: S is a seed-color gene, and L is a plant-height gene. Each gene ...
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