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Why is variation essential for evolution?
For one, without genetic variation, a species is more likely to face significant danger from disease. In humans there are some diseases that affect a few races more than others, but because of genetic variations, our species as a whole is more likely to adapt to new diseases and survive rather than if everybody had the same predisposition toward a disease.
How does genetic variation create new species over time?
New species evolve from a previous existing species. As challenges arrive in the environment of the old species over many many generations body features are lost and/or gained. Eventually the old species will either eventually die out or change habitats. So basic evolution.
What is the main goal of cellular reproduction?
The purpose of cellular mitosis is for the growth of an organism. It produces two cells with identical genetic information, and replaces damaged or dead cells.
What is being carried by a genetic carrier?
A genetic carrier has a dominant and a recessive version of an allele. Normally, the term genetic carrier is used in relation to genetic illnesses where two copies of the recessive allele cause that illness. Therefore, a carrier does not have the illness themself (as the dominant, non-disease allele is expressed over the recessive allele). However, they have the ability to create an offspring who has the double recessive genotype and therefore has the condition if they mate with another carrier or someone who is double recessive (who has the disease).
Can a lemon power a light bulb?
it depends on the amount of acid in the lemon and lemon does not create make it conducts electricity
How does meiosis create variation?
Meiosis creates genetic variation through the production of 4 haploid daughter cells, each with random genetic combinations. Meiosis also creates genetic variation through the process called crossing over, where chromosome segments are exchanged.
Is fertilization heredity genetic variation or both?
Fertilization contributes to genetic variation by combining the genetic material from two parents to create a unique genetic makeup in offspring. The inheritance of specific genes from each parent determines the traits and characteristics of the offspring.
Why is genetic recombination and crossover important in the process of evolution and genetic diversity?
Genetic recombination and crossover are important in evolution and genetic diversity because they create new combinations of genes, leading to genetic variation. This variation allows for the adaptation of populations to changing environments and increases the chances of survival and reproduction.
How do you ensure variation in offspring?
Variation in offspring is ensured through the process of sexual reproduction, where genetic material is mixed from two parents to create unique combinations of genes in the offspring. This variation is further increased through the random assortment of genes during meiosis and genetic recombination. Mutations in DNA also contribute to genetic diversity and variation in offspring.
What kind of impact does crossing over create in genetic variation during meiosis?
Crossing over during meiosis creates genetic variation by exchanging genetic material between homologous chromosomes, leading to new combinations of genes in offspring. This increases genetic diversity and can result in unique traits in individuals.
How do pair of chromosomes contribute to genetic inheritance and variation in organisms?
During reproduction, a pair of chromosomes from each parent combine to create a unique genetic makeup for the offspring. This process leads to genetic inheritance and variation in organisms, as the combination of genes on the chromosomes determines the traits and characteristics of the offspring.
How can alleles exhibit variation in genetic traits?
Alleles can exhibit variation in genetic traits through different forms of genetic mutations, such as substitutions, insertions, or deletions of nucleotides in the DNA sequence. These mutations can lead to changes in the protein encoded by the gene, resulting in variations in traits such as eye color, height, or disease susceptibility. Additionally, genetic recombination during meiosis can also create new combinations of alleles, further contributing to genetic variation.
What process provides the genetic variability that natural selection acts on during evolution?
The ultimate source of variation is mutation. However, recombination, or crossing over, can produce enormous amounts of variation by shuffling alleles into different combinations. Combined, the two processes produce the variation upon which natural selection can act, and which results in evolution.
Sexual reproduction patterns include the example of?
mating between male and female organisms to produce offspring with genetic variation. This process involves the fusion of gametes (sperm and egg) from two individuals to create a genetically unique individual. This method promotes genetic diversity and adaptation within a population.
How are alleles and mutations linked in the context of genetic variation and inheritance?
Alleles are different forms of a gene that can result from mutations. Mutations are changes in the DNA sequence that can create new alleles. These new alleles can lead to genetic variation, which can affect inheritance patterns in offspring.
Mutations and the genetic shuffling that occur during sexual reproduction are both sources of?
Genetic variation. Mutations introduce new genetic changes that can be passed on to offspring, while genetic shuffling during sexual reproduction mixes genetic material from two parents to create unique combinations of genes in the offspring.
How do flowers create air?
Flowers dont create air; plants are able to produce (or recycle - whichever way you look at it), Oxygen from water and carbon dioxide through the process of photosysnthesis.
