0
Is the probability of a mutation at a particular gene locus high or low?
Wiki User
∙ 14y ago
The probability of a mutation at a particular gene locus is low, and the probability of
a mutation in the genome of a particular individual is high.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
What is the probability that a woman who is a carrier of the colorblind gene and a color blind man will have a first son who will be color blind?
The probability is 0 (but the daughter will be a carrier of the color blind gene). This is because the gene dictating whether someone is color blind or not is linked to the X chromosome (and not the Y). The color blind gene is a recessive gene whilst the normal color vision gene is a dominant gene. Hence if a girl (XX) has one normal vision gene (from one parent) and one color blind gene (from the other parent), her normal vision gene will be dominant to the recessive color blind gene and hence she will have normal vision (but she will be a carrier of the color blind gene). If both her parents contribute the recessive color blind gene to her, then she will be color blind. For a woman (XX) to be color blind, she needs to be have both genes to be recessive (ie where there is no dominant normal color vision gene to dominate). For a man (XY), as long as the X gene contributed by his mother is a color blind gene, he will be color blind because he has no other X chromosome where a dominant normal color gene could reside. Hence, to answer the question, a man with normal color vision (XY, with a dominant normal color vision X gene since the gene can't be the recessive color blind gene otherwise he will be colorblind) and a colorblind woman (XX, both recessive color blind genes), will each contribute an X each the child. The man will contribute his only X chromosome which carries the normal color vision X gene and the woman can only contribute a recessive color blind gene. The man's normal color vision X gene will be dominant, and hence the daughter will definitely have normal vision (despite being a carrier).
What is the probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder?
75%. Explanation: if both parents are carriers than their Gametes would be Dd x Dd, resulting in DD (1/4), Dd (2/4), and dd(1/4), meaning that there is a 25% chance that they will have a child that has the disorder. DD = A normal child that lacks the recessive gene, therefore not a carrier Dd = A normal child that carries the recessive gene dd = A child with the disorder + carries the gene, hence the child's future offspring will carry it as well. Source: Self/Basic Punnet Square
Who invented central tendency?
Gene Allen Holland
How many red heads are there?
Red hair is a genetic mutation. To have red hair, you need to inherit two recessive genes (one from the father, one from the mother). Inheriting one recessive gene will make you a carrier, but you will not have red hair. Because of this, it's a fairly low proportion of the world population- around 1-2%. With a world population of 7,000,000,000 though, this adds up to around 140,000,000. Redheads are most heavily concentrated in Western/Northern Europe (Europe as a whole is 4% red head), the US and Australia (although they are found around the world). Within a gene-pool, carriers of the recessive gene repeatedly having children together leads to high concentrations of offspring with two recessive genes, and so concentrated populations of red heads. The highest proportion of red heads in the world is in Scotland, at around 13%, followed by Ireland at 10%. In terms of numbers, the US (at 2-6%) has the largest red-headed population.
Explain what the term relative frequency means?
Number of times an allele occurs Ina gene pool camparing it's placement with that of fossils on other layers of rock
What is the definition of locus?
The particular site where a gene is found on a chromosome.
How are terms gene locus and allele related?
Gene locus is a specific location on an allele.
Whats a change in gene or chromosome?
A change in a gene or chromosome is called a: Mutation
What is the difference between a factor and an allele?
A locus is a particular location or a marker on a chromosome. It can be a gene but really only needs to be an identifiable location on the chromosome. Alleles differ in that they refer to a particular sequence of DNA at a given locus. The distinction from loci is that multiple alleles can exist for the same locus. http://www.informatics.jax.org/silverbook/glossary.shtml
A mutation that involves a single nucleotide is called a(an)?
Point Mutation- a type of gene mutation in which only a single nucleotide in a gene has been changed.
What do you call the physical location of a gene?
The specific term is gene locus. If the exact location is known then there is more specific terminology that refers to the chromosome number whether the locus is on the short (p) or long (q) arm of the chromosome and it's specific location based on band and sub-band location.
What is the term for any permanent change in a gene of chromosome?
The permanent change in a gene or a chromosome is called Mutation.
What is the difference between a variation and a mutation?
mutation is an alteration in the nucleotide sequence of a gene whereas variation is any difference between individuals of a particular species.
What is the sudden change in a gene called?
The sudden change in a gene is called a mutation.
What is the term for when an organism has two identical alleles for a trait?
The term is homozygous.This means that the alleles of a particular gene, at a particular locus on a specific chromosome, are the same.
Is Huntington's Disease a gene mutation?
No, it's caused by a single point mutation of a gene.
What is the effects of mutation?
A mutation is a permenent in DNA sequence of a gene,mutation in a gene's DNA sequence can alterthe aminoacid sequence of the protein encodedby the gene.
