In a population, with time the frequency of some alleles/genotypes decreases" describes... Group of answer choices   Evolution by natural selection   Evolution by genetic drift   Any evolution   Any phenotypic plasticity

A population of birds has two alleles encoding for three different phenotypes: long wings, wingsss, and mid-length wings. . The initial frequency of the Sallele was 0.63 and the sallele was 0.37. However 97% of the long-winged birds survived to reproductive age56% of mid-length birds survived to reproductive age, and only 10% of short-winged birds survived to reproductive age. You are going to determine if natural selection has an effect on the allele frequency What is the expected frequency of the Sallele in the next generation when you incorporate the survival rate? Please use as many decimals points as possible when doing your calculations. Please answer using four decimal points. (Your population can be 100 or 1000 individuals or any numberreally up to you.I work with 1000but that won't change the results because we are talking about frequency.)

For this natural selection story, focus on just ONE GENETIC TRAIT that has two alleles. This is a make-believe story but the story line should sound plausible. Do not involve humans in any way. Once upon a time there was a population of polar bears. Most of the polar bears had/were_(a)___ but a small proportion of the population had/were__(b) ___ Over many generations, the proportion of bears expressing the rare allele became more common through natural selection. What was going on within this population to cause this shift? ___(c)_(very brief is great!) Note: do NOT mention whether the alleles are dominant/recessive nor about individuals being homozygous etc. We are looking at the big picture population-level patterns only.

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"Descent with modification" describes... Choose the best option. Group of answer choices Any evolution Evolution by natural selection Phenotypic plasticity Evolution by genetic drift

Each of the following has a better chance of influencing genotype frequencies in small populations than in large populations, but which one has the greatest influence in small populations? Group of answer choices Non-random mating Natural selection Gene flow Genetic drift Mutation      PreviousNext

What are the 4 Mechanisms of Evolution? 1. 2. 3. 4. 1) OVERPRODUCTION - What leads to over overproduction? Observations Overproduction of offspring 2) Variation needs to be: Individual variation : When a genetic trait becomes more abundant in a population because it helps you to get : About Genotype - another population. Tends to... Conclusion. Natural selection: unequal reproductive success : About Phenotype - Is genetic exchange with

According to the _________ hypothesis, selection is weaker later in life making aging alleles only mildly deleterious. Muller's ratchet mutation accumulation antagonistic pleiotropy rate of living

Which can bring new traits to a population and why? natural selection - because it increases the frequency of adaptive alleles in a population over time natural selection - because it makes new alleles natural selection and mutation because both increase the frequency of adaptive alleles in a population over time O mutation becaust makes new alleles mutation because it increases the frequency of adaptive alleles in a population over time O natural selection and mutation because both make new alleles 99+

Based on the information provided, what is the number of adults after the natural selection? Embryo BB Bb bb Total Number 100 250 150 500 Frequency 0.20 0.50 0.30 1 Relative 0.5 1 0.5 fitness (w) Natural selection occurs Adult BB Bb bb Total Number BB=50, Bb=250, bb=75 O BB=100, Bb=100, bb=500 O BB-50, Bb=100, bb=50 O BB=100, Bb=250, bb=150 O BB=50, Bb=250, bb=50