💬 👋 We’re always here. Join our Discord to connect with other students 24/7, any time, night or day.Join Here!
No Related Subtopics
University of Wisconsin - Madison
University of Pennsylvania
All the organisms on your campus make up
(A) an ecosystem.
(B) a community.
(C) a population.
(D) a taxonomic domain.
Systems biology is mainly an attempt to
(A) analyze genomes from different species.
(B) simplify complex problems by reducing the system into smaller, less complex units.
(C) understand the behavior of entire biological systems by studying interactions among its component parts.
(D) build high-throughput machines for the rapid acquisition of biological data.
Which of the following best demonstrates the unity among all
(A) emergent properties
(B) descent with modification
(C) the structure and function of DNA
(D) natural selection
Evoution connection A typical prokaryotic cell has about
$3,000$ genes in its DNA, while a human cell has almost $21,000$
genes. About $1,000$ of these genes are present in both types of
cells. Based on your understanding of evolution, explain how such different organisms could have this same subset of $1,000$ genes. What sorts of functions might these shared genes have?
Create your own quiz or take a quiz that has been automatically generated based on what you have been learning. Expose yourself to new questions and test your abilities with different levels of difficulty.
Create your own quiz
In this video, we will discuss how certain genes are going to be physically linked on chromosomes and how this physical linkage will translate into a genetic linkage off those genes. So we know that Gregor Mendel have this law of independent assortment, and this law basically postulated that all of our different Leal's they're going to be independently segregated and independently split between two daughter cells independent of one another. So if we are to look at, for example, a cell right here and we're going to have these homologous chromosomes, well, then we'll note it will notice that the way that these chromosomes will be split between the two daughter cells will be independent of one another. So this homologous pair right here will be independently, assorted or independently orientated off this homologous pair right here. So they're going to be independent of one another. And thus the If we were to say that this is going to be from the mom and this one is from the dad, then on this, of course, could be parent one and parent to, um this bob number or this chromosome off. The homologous pair will not necessarily have to come from the dad because it's on the right hand side. It could come from the mom. So the way that these homologous pairs of chromosomes will orient themselves along the midline during our division, specifically a myopic division that will be responsible for sexual reproduction, this orientation is going to be independent of one another. So this all happens in its own little bubble. So this is true. But our understanding is that each chromosome is going to have, of course, many, many different genes on it. So in reality, we are going to have situations where surgeon jeans, they're going to be linked with one another. And how is this going to be possible? Well, if we were to look at a chromosome right here, we know that there is this place on the chromosome called a locus, and this locus is going to be where theme the genetic information for a specific A Leo is stored. So it's the actual physical location on the chromosome of where we can find the gene in question, and it just so happens that they're going to be certain cases. Where to Lok. I are going to be really close to one another, and this means that these two genes will most often be inherited together. So if we were to think about linked genes, then these genes air Simply going to be, um, and jeans or Leal's Who's Loh Kai are in close proximity toe one another. Thus they are usually inherited together. And although Gregor Mendel believe that all of these different genes they're going to be inherited independently of one another. Here we find that if we have two genes that are going to be really close together, if this distance is going to be very small, then it is, ah, high probability or a high likelihood that we will have these two genes inherited together, and thus they are linked genes. So as you can see the actual physical location off our genes, the the actual locus of that gene where it is going to be found on the chromosome will be tied in with the way that it is going to be inherited. So physical proximity leads to inheritance in a linked manner, and thus we would get genetic linkage
Genomics and Biotechnology