1. Natural selection refers to the process by which certain traits become more or less common in a population over generations, based on their ability to increase the survival or reproductive success of individuals who possess them. This occurs because individuals with advantageous traits are more likely to survive and pass on those traits to their offspring, while those with disadvantageous traits are less likely to survive and reproduce.
2. Inbreeding is the mating of closely related individuals, which can lead to an increase in homozygosity (the state of having identical alleles for a particular gene) and a decrease in genetic diversity within a population. This can increase the likelihood of deleterious or harmful alleles being expressed, as there is a greater chance of two carriers of the same recessive mutation mating and producing an affected offspring.
3. Selective pressures refer to any factors that influence the survival or reproduction of individuals in a population, and thus affect the frequencies of particular traits in that population. Examples of selective pressures include predation, competition for resources, climate change, and human activities.
4. Genome refers to the complete set of genetic material (or DNA) present in an organism, including both genes and non-coding regions of DNA.
5. Genotype refers to the genetic makeup of an organism, including all of the alleles (variants of genes) that an individual possesses.
6. Phenotype refers to the observable traits or characteristics of an organism, which are the result of both genetic and environmental factors. Examples of phenotypic traits include eye color, height, and behavior.
7. Genetic variation refers to the differences in DNA sequence or allele frequencies between individuals within a population. This variation can arise through mutation, recombination, or other mechanisms.
8. Gene pool refers to the total collection of genes (alleles) present in a population. It includes all of the genetic variation that can be passed from one generation to the next through mating.
9. Evolve refers to the process by which populations of organisms change over time, as a result of natural selection, genetic drift, mutation, migration, or other mechanisms. This can lead to the emergence of new species or adaptations to different environmental conditions.
10. Variation refers to the differences that exist between individual organisms or within a population, including genetic, morphological, and behavioral traits. Variation is an important factor in the process of natural selection, which acts on the differences between individuals to select for advantageous traits.
Define the Following Words:
1. Natural Selection
2. Inbreeding
3. Selective Pressures
4. Genome
5. Genotype
6. Phenotype
7. Genetic Variation
8. Gene Pool
9. Evolve
10. Variation
3 answers
Fill in the blanks using the following words:
survive, advantageous trait, less, selective pressures, genetic modification,
1. The amount of food, space, and predators are examples of _____________________ that limit the number of individuals that the environment can support.
2. Organisms with genetic variations that give an advantage are more likely to _______________.
3. In a muddy lake environment, some fish have brown scales. Most fish, however, have silver scales. Predators have a harder time seeing fish with brown scales, which means that brown scales are an _____________________________.
4. Making crops that are resistant to pesticides and insects is an example of ______________________________.
5. Humans that produced __________melanin became more common as populations migrated away from the equator.
survive, advantageous trait, less, selective pressures, genetic modification,
1. The amount of food, space, and predators are examples of _____________________ that limit the number of individuals that the environment can support.
2. Organisms with genetic variations that give an advantage are more likely to _______________.
3. In a muddy lake environment, some fish have brown scales. Most fish, however, have silver scales. Predators have a harder time seeing fish with brown scales, which means that brown scales are an _____________________________.
4. Making crops that are resistant to pesticides and insects is an example of ______________________________.
5. Humans that produced __________melanin became more common as populations migrated away from the equator.
1. The amount of food, space, and predators are examples of selective pressures that limit the number of individuals that the environment can support.
2. Organisms with genetic variations that give an advantage are more likely to survive.
3. In a muddy lake environment, some fish have brown scales. Most fish, however, have silver scales. Predators have a harder time seeing fish with brown scales, which means that brown scales are an advantageous trait.
4. Making crops that are resistant to pesticides and insects is an example of genetic modification.
5. Humans that produced less melanin became more common as populations migrated away from the equator.
2. Organisms with genetic variations that give an advantage are more likely to survive.
3. In a muddy lake environment, some fish have brown scales. Most fish, however, have silver scales. Predators have a harder time seeing fish with brown scales, which means that brown scales are an advantageous trait.
4. Making crops that are resistant to pesticides and insects is an example of genetic modification.
5. Humans that produced less melanin became more common as populations migrated away from the equator.
7 answers