What Is An Allele

I hope this helps you easily understand the differnece between alleles and genes 🧬 Let me know if you have any questions and what topic you want me to go over next :) #alleles #vs #genes #genetics #easy #biology #highschool #learnontiktok #differencebetween #greenscreen

#biology #engineering #stem #science #research #genetics

Genes vs. Alleles #gene #genetics #allele #biology #chromosome #dna #greenscreen

The Genetic Code: Unveiling the Power of Alleles

Gene Pool and Evolution #genepool #evolution #biology #science #greenscreen

Allele frequency #learnwithtiktok #learn

"Evolution is the process by which populations change over time. When we talk about how populations change in an evolutionary sense, we’re generally talking about the frequency of different alleles within that population. Remember: an allele is one “version” of a particular gene. Different alleles are often associated with different phenotypes, or observable traits, such as seed color in pea plants or beak size in finches. Natural selection, mutation, genetic drift, and gene flow (gene migration) all contribute to changes in allele frequencies. Collectively, these are referred to as the main mechanisms of evolution. Natural selection is the “prototypical” mechanism of evolution. At the most basic level, organisms have traits that they can pass on to their offspring. Populations often produce more offspring than the available resources will support. This means that individuals with traits that help them survive in their environment are more likely to reproduce and pass on those advantageous traits to their own offspring. Over time, an allele for a trait that gives this kind of advantage will become more common in the population as a whole. However, there are a few factors that make natural selection a bit more complex than just “survival (and reproduction) of the fittest.” In response to pressures imposed by the environment, there are a few different patterns that natural selection occurs in—these are called modes of selection. Genetic drift occurs when the frequency of a particular allele changes randomly. It has a greater effect on smaller populations, and, in response to a population bottleneck—an event that drastically decreases a population’s size—some alleles can be lost entirely. Bottlenecks could be caused by anything from a natural disaster to disease to geographic isolation. In very small populations, genetic drift can lead to an allele being completely lost just by chance. In extreme situations, one allele could become the only one left in a population for a particular gene. This is called becoming “fixed.” The founder effect is an example of genetic drift in which individuals from one population go to a new area and establish a population in isolation from the original one. Because the individuals who began the new population may not represent the full range of alleles present in the source population, the allele frequencies in the new population can be different." #biology #apbiology #apbio #evolution #naturalselection

Homozygous/heterozygous rev!. Tag friends and follow for previous videos!! #gcse2021#gcsebiologyrevision#gcsebiology#biologyteacher#aqa#ocr#edexcel

help! #qcaa #biology #whatisanallelefrequency

Genotype #biology #genetics #genotype #allele #dna #chromosome #greenscreen

Multiple allele trait #multipleallele #allele #multiplealleletrait #genetics #biology #bloodtype #apbiology #greenscreen

#genes #alleles #education #originalman

reason why I dropped biologey #fyp

#genetics #revision #biology #gcse