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What is meant by the statement evolution may proceed along genetic lines of least resistance?

What is meant by the statement evolution may proceed along genetic lines of least resistance?

What is meant by the statement “Evolution may proceed along ‘genetic lines of least resistance’”? Characters with little genetic variation will constrain the rate of natural selection; correlated characters may increase in fitness less rapidly, because they can evolve only along the greatest axis of variation.

When the environment affects the phenotypes of all the genotypes in a population and the reaction norms of the genotypes are parallel?

When the environment affects the phenotypes of all the genotypes in a population and the reaction norms of the genotypes are parallel. only genetic variance and environmental variation contribute to phenotypic variance. QTL mapping is a method for detecting loci that contribute to quantitative trait variation.

Which of the following would likely cause the greatest mean rates of change to morphological characters in a large population with a constant mutation rate?

natural selection. Which of the following would likely cause the greatest mean evolutionary rates of morphological characters in a large population with a constant mutation rate? Anthropogenic climate change is taking place at such a fast rate that many species will fail to adapt quickly enough to avoid extinction.

Why does evolution have to involve the change of the genetic makeup of a population over time?

Why does evolution have to involve the change of the genetic makeup of a population over time? Allele frequencies fluctuating form one generation to the next especially in small populations.

How does DNA prove evolution?

As the ability to sequence the nucleotides making up DNA has improved, it also has become possible to use genes to reconstruct the evolutionary history of organisms. Because of mutations, the sequence of nucleotides in a gene gradually changes over time.

Why is knowledge of genetics important to understanding evolutionary processes?

genetics has greatly enriched the diversity of mechanisms known to cause evolutionary change. All of these mechanisms involve the conversion of variation between individuals into variation between populations in time and space, but many are non-selective or even counter-selective.

Why is genetics so important?

Understanding genetic factors and genetic disorders is important in learning more about promoting health and preventing disease. Some genetic changes have been associated with an increased risk of having a child with a birth defect or developmental disability or developing diseases like cancer or heart disease.

Why is understanding how genetics really works important to society?

Taking time to learn about genetics can help you understand your own health and make healthy choices. Genes that do not work correctly can cause problems. A group of rare diseases are caused when a single gene stops working normally.

How do genetics affect us?

Genes can carry instructions that can make it more likely for you to develop certain illnesses or conditions. For example, Jennifer and Karen both have genes associated with obesity. Their genes could tell their body to: increase the size of their fat cells or dictate how they use fat in their body.

How does genetics affect everyday life examples?

Scientific research has today advanced further and identified genes coding for the way muscles in our body respond to diet and training, skin types and their response to nutrition, the control of hair fall, risk of diabetic complications, obesity, addictions and a lot more. “This actually came to us from the public.

How is genetics used in everyday life?

Genetics can help health-care professionals to identify certain conditions in babies before they are born using techniques such as prenatal testing. Genetic technologies are also being used to help develop targeted medicines for certain diseases.

What is an example of gene?

For example, if both of your parents have green eyes, you might inherit the trait for green eyes from them. Or if your mom has freckles, you might have freckles too because you inherited the trait for freckles. Genes aren’t just found in humans — all animals and plants have genes, too.

What factors in daily life can alter DNA?

Several lifestyle factors have been identified that might modify epigenetic patterns, such as diet, obesity, physical activity, tobacco smoking, alcohol consumption, environmental pollutants, psychological stress, and working on night shifts.

What are some examples of genetic factors?

Genetic Factors

  • Familial Alzheimer’s Disease.
  • Familial FTD.
  • Familial Prion Disease.
  • Genetic Counseling.

Is genetic testing good or bad?

There is little value in genetic tests that do not allow you to take action to reduce or change your risk for a particular disease. In other words, genetic testing is a good idea only when the pros of genetic testing outweigh the cons for your situation. It’s shouldn’t be a one-size-fits-all approach.