What describes an inheritance pattern that shows incomplete dominance?
Describe the inheritance patterns of incomplete dominance, multiple alleles, codominance, pleiotropy, and polygenic inheritance. • Incomplete dominance – Neither allele is dominant over the other and expression of both alleles occurs.
How are linked genes inherited differently from non linked genes?
Explain how linked genes are inherited differently from non linked genes. Linked genes are located close together on the same chromosome and tend to be inherited together. If the genes were not linked, then independent assortment should produce offspring in a phenotypic ratio of one to one to one to one.
What is the key to the recognition of polygenic inheritance?
|Term Q: Genes are carried on ______||Definition Chromosomes|
|Term q: What is the key to the recognition of a trait whose expression is determined by the effects of two or more genes (polygenic inheritance)?||Definition the trait exhibits continuous distribution|
How can the sickle cell allele be adaptive?
Explain how the sickle-cell allele can be adaptive. Affects the type of hemoglobin produced and the shape of red blood cells, causes anemia and organ damage, sickle-cell and nonsickle alleles are codominant, carries of sickle-cell disease are resistant to malaria.
What does it mean to say that an allele is fixed in the population?
Why is genetic drift aptly named?
Its frequency is 0.0. Drift is caused by random sampling error or other chance events. Why is genetic drift aptly named? It causes allele frequencies to drift up or down over time.
What occurs in a point mutation?
Point mutations are a large category of mutations that describe a change in single nucleotide of DNA, such that that nucleotide is switched for another nucleotide, or that nucleotide is deleted, or a single nucleotide is inserted into the DNA that causes that DNA to be different from the normal or wild type gene …
What is translocation How could it be beneficial?
Translocation can be beneficial, for example, the translocation of a part of one chromosome to a different chromosome could link DNA segments in a way that results in a positive effect. The result is an expanded genome with new genes that may take on new functions, playing a major role in evolution.
What are the three major factors that can cause changes in allele frequencies?
Microevolution is defined as a change in allele frequencies in a population over time. Three mechanisms can cause allele frequencies to change: natural selection, genetic drift (chance events that alter allele frequencies), and gene flow (the transfer of alleles between populations).
Which of the following are causes of evolution?
Describe the four basic causes of evolution: natural selection, mutation, genetic drift, and gene flow.
What is the only adaptive mechanism?
Natural selection is the only mechanism that consistently causes adaptive evolution.
What are the three types of selection?
The 3 Types of Natural Selection
- Stabilizing Selection.
- Directional Selection.
- Disruptive Selection.
Under which condition would a mutation have the most impact on allele frequency?
A mutation has the most impact on allele frequency when there is no gene flow.
What causes gene flow?
Gene flow is the movement of genes into or out of a population. Such movement may be due to migration of individual organisms that reproduce in their new populations, or to the movement of gametes (e.g., as a consequence of pollen transfer among plants).
Which best describes genetic drift?
Explanation: Random fluctuations in the gene frequencies within a population Eliminate is the one which best describes genetic drift.
What does the term genetic drift mean?
Genetic drift describes random fluctuations in the numbers of gene variants in a population. Genetic drift takes place when the occurrence of variant forms of a gene, called alleles, increases and decreases by chance over time. These variations in the presence of alleles are measured as changes in allele frequencies.
Which of the following best describes a gene pool?
The correct answer would be a. the sum of all genetic traits in a population’s individuals at a given time. A gene pool is defined as a sum total of all the genes present in an inter-breeding population at a specific time.
Which best describes genetic drift Brainly?
The correct answer is B. Genetic drift is one of the four evolutionary mechanisms. It changes the frequency by chance, aka at random.
Which tends to increase genetic variation in a population?
Which will make a population have more genetic variation apex?
I believe mutation will make a population have more genetic variation. It is the difference in DNA sequences between individuals within a population. Variation permits flexibility and survival of a population in the face of changing environmental circumstances.
What increases genetic variation apex?
Explanation: The mutation increase genetic variation.
Which increases the rate of speciation apex?
Rate of speciation increases due to reproductive isolation, which prevents mating between members of different species to accumulate genetic differences in the population. over time, it leads to arise of new and different species.
What happens when a population is in Hardy Weinberg equilibrium apex?
When a population is in Hardy-Weinberg equilibrium for a gene, it is not evolving, and allele frequencies will stay the same across generations. There are five basic Hardy-Weinberg assumptions: no mutation, random mating, no gene flow, infinite population size, and no selection.
Which is an example of genetic drift?
Genetic drift is a change in the frequency of an allele within a population over time. A population of rabbits can have brown fur and white fur with brown fur being the dominant allele. By random chance, the offspring may all be brown and this could reduce or eliminate the allele for white fur.