Does random mating affect evolution?
Like recombination, non-random mating can act as an ancillary process for natural selection to cause evolution to occur. A single generation of random mating will restore genetic equilibrium if no other evolutionary mechanism is operating on the population.
What is the result of assortative mating?
Assortative mating is the tendency for people to choose mates who are more similar (positive) or dissimilar (negative) to themselves in phenotype characteristics than would be expected by chance.
What are two examples of non-random mating?
Nonrandom mating is a phenomenon that individuals choose their mates based on their genotypes or phenotypes. Examples of this kind of mating occur in species like humans, peacocks, and frogs. Nonrandom mating can happen in many different forms, one being assortative mating.
Why is mating a non-random process?
Non-random mating means that mate selection is influenced by phenotypic differences based on underlying genotypic differences. In some species, males acquire harems and monopolize females. (Elk, elephant seals, horses, lions, etc.) Commonly, the males of such species are much larger than the females.
What causes non-random mating?
When a population interbreeds, nonrandom mating can sometimes occur because one organism chooses to mate with another based on certain traits. In this case, individuals in the population make specific behavioral choices, and these choices shape the genetic combinations that appear in successive generations.
Does Disassortative mating increase diversity?
The result of genetic disassortative mating is a population structure characterized by an excess of heterozygotes and a high degree of genotypic diversity.
How many generations of random mating does it take to restore a population to Hardy-Weinberg equilibrium?
two generations
How do you calculate Hardy-Weinberg?
Knowing p and q, it is a simple matter to plug these values into the Hardy-Weinberg equation (p² + 2pq + q² = 1). This then provides the predicted frequencies of all three genotypes for the selected trait within the population.
What is the frequency of the recessive allele?
The frequency of the recessive allele in the population. Answer: We know from the above that q2 is 1/2,500 or 0.0004. Therefore, q is the square root, or 0.02.
How can you tell if someone is homozygous or heterozygous?
Because an organism has two sets of chromosomes, it usually only has two options to choose from when determining phenotype. If an organism has identical genes on both chromosomes, it is said to be homozygous. If the organism has two different alleles of the gene it is said to be heterozygous.
Are females heterozygous or homozygous?
Females (XX) have two copies of each gene on the X chromosome, so they can be heterozygous or homozygous for a given allele. However, males (XY) will express all the alleles present on the single X chromosome that they receive from their mother, and concepts such as ‘dominant’ or ‘recessive’ are irrelevant.
What do you mean by gene frequency?
Gene frequency can be defined as the fraction or percentage of a population that carries allele (i.e., one type of a gene variant) at a particular locus (Gillespie 2004). It is also more appropriately known as allele frequency.