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What is an individual who has a recessive disease causing allele at a particular gene on one chromosome and a normal allele at that gene on the other chromosome?
An individual with a recessive disease-causing allele on one chromosome and a normal allele on the other chromosome is referred to as a heterozygote for that gene. Since the disease is recessive, the normal allele typically masks the effects of the recessive allele, meaning the individual usually does not exhibit symptoms of the disease. However, they can still pass the recessive allele to their offspring.
What else can I help you with?
What type of allele is responsible for causing duchenne muscular dystrophy?
Duchenne muscular dystrophy is caused by a recessive allele on the X chromosome. This means that males are more commonly affected since they only have one X chromosome. Females can carry the allele but are usually not affected due to having a second X chromosome that often carries a normal copy of the gene.
Iis down syndom caused by a dominant or recessive allele?
Down syndrome is caused by the presence of an extra copy of chromosome 21, known as trisomy 21. It is not caused by a single gene with a dominant or recessive inheritance pattern. It is a chromosomal disorder that can occur randomly during cell division.
An individual who has one copy of a recessive autosomal allele that causes disease in the homozygous condition?
They are a carrier of the disease but do not show any symptoms because they have one normal allele that can compensate for the recessive disease-causing allele. If they have children with a partner who is also a carrier, there is a chance their offspring may inherit two copies of the disease-causing allele and develop the disease.
What causes a chromosome inversion?
Chromosome inversions are caused by breaks in the chromosome followed by rejoining in an inverted orientation. This can happen due to errors during cell division or exposure to mutagens. Inversions can also be inherited from parents.
What chromosome is Spina Bifida located on?
Spina Bifida is not located on a specific chromosome. It is a neural tube defect that can be influenced by both genetic and environmental factors. There is no single gene or chromosomal location identified as causing Spina Bifida.
What does recessive albinism mean?
An Autosomal recessive pattern is one in which certain genes of the X sex chromosome are turned off, autosomal is in reference to the X chromosome and the fact that the genes are turned off is indicated by the recessive. So in the case of Albinism the pigmentation genes in the X chromosome are turned off causing the various side effects.
What type of allele is responsible for causing duchenne muscular dystrophy?
Duchenne muscular dystrophy is caused by a recessive allele on the X chromosome. This means that males are more commonly affected since they only have one X chromosome. Females can carry the allele but are usually not affected due to having a second X chromosome that often carries a normal copy of the gene.
Iis down syndom caused by a dominant or recessive allele?
Down syndrome is caused by the presence of an extra copy of chromosome 21, known as trisomy 21. It is not caused by a single gene with a dominant or recessive inheritance pattern. It is a chromosomal disorder that can occur randomly during cell division.
When does disruptive selection occur?
Disruptive selection occurs when there is selection against the heterozygous individual, causing the population of homozygous dominant and homozygous recessive individuals to increase, splitting the population into two groups corresponding to the dominant/recessive alleles.
An individual who has one copy of a recessive autosomal allele that causes disease in the homozygous condition?
They are a carrier of the disease but do not show any symptoms because they have one normal allele that can compensate for the recessive disease-causing allele. If they have children with a partner who is also a carrier, there is a chance their offspring may inherit two copies of the disease-causing allele and develop the disease.
What has the disadvantage of bringing two recessive alleles together and causing a genetic defect?
Inbreeding
Why is it possible for a man to be a carrier with a recessive genetic disorder but not with a sex-linked disorder?
The body has 23 pairs of chromosomes. There are numbers 1-22, then the 23rd pair are the sex chromosomes. Females have two X chromosomes, making them XX, men have one X and one Y, making them XY. The principle of a genetic disorder, let's call it "p", is that if someone has one normal, dominant chromosome "P" and one disease-causing, recessive chromosome "p", they are a carrier for the disease, but don't actually suffer from it (effectively the "P" overrides the "p"). Sex-linked disorders are carried on the X chromosome. If a woman inherits one normal X and one X with a recessive disease on it, she will just be a carrier, as she always gets two X's. Men on the other hand are XY, any disease they inherit on their X chromosome will present because they don't have another, potentially normal, X around to override the diseased one. Hope this helps. :)
What causes a chromosome inversion?
Chromosome inversions are caused by breaks in the chromosome followed by rejoining in an inverted orientation. This can happen due to errors during cell division or exposure to mutagens. Inversions can also be inherited from parents.
What chromosome is Spina Bifida located on?
Spina Bifida is not located on a specific chromosome. It is a neural tube defect that can be influenced by both genetic and environmental factors. There is no single gene or chromosomal location identified as causing Spina Bifida.
Why is albinism recessive?
Albinism is a genetic trait that causes the body not to produce melanin normally... Melanin is a pigment that's responsible for the darker colors like brown, tan, black in our skin and hair... As you said it's recessive... this is because in order for an individual to be an albino they have to have inherited 2 copies of the recessive, albino causing gene (aa). If they only inherit one (Aa) they will still produce melanin normally, so their skin and hair will be fully pigmented.
Why albinism is recessive disease?
Albinism is a genetic trait that causes the body not to produce melanin normally... Melanin is a pigment that's responsible for the darker colors like brown, tan, black in our skin and hair... As you said it's recessive... this is because in order for an individual to be an albino they have to have inherited 2 copies of the recessive, albino causing gene (aa). If they only inherit one (Aa) they will still produce melanin normally, so their skin and hair will be fully pigmented.
Do autosomes have lethal recessive genes?
Yes, autosomes can carry lethal recessive genes. These genes can result in lethal genetic disorders when a person inherits two copies of the mutated gene, one from each parent, causing the disorder to manifest.
