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Sex-linked disorders are caused by males having?
Sex-linked disorders are often caused by males having only one X chromosome, as they inherit a Y chromosome from their father. This means that any recessive allele on the X chromosome, which may be associated with a disorder, will be expressed in males since there is no corresponding allele on the Y chromosome to mask its effects. Consequently, conditions like hemophilia and color blindness are more commonly observed in males than in females. Females, having two X chromosomes, may be carriers without showing symptoms if they have one normal allele.
What is the nervous system that breakdown that is caused by an autosomal recessive allele?
One example of a nervous system breakdown caused by an autosomal recessive allele is spinal muscular atrophy (SMA). SMA is a genetic disorder that leads to the loss of motor neurons in the spinal cord, resulting in muscle weakness and atrophy. It is caused by mutations in the SMN1 gene on chromosome 5.
What are the genetic disorder caused by deletion from chromosome?
Deletion Syndrome or Williams Syndrome
Why can females but not males be carriers of sex linked genetic disorders?
Females have two X chromosomes, allowing them to be carriers of sex-linked genetic disorders on one X chromosome while having a normal allele on the other X chromosome. Males have only one X chromosome and one Y chromosome, so any genetic disorder on their single X chromosome will manifest as the disorder rather than being masked.
What feature of a pedigree would allow one to conclude that the disorder was caused by a dominant allele?
If the disorder is caused by a dominant allele, you would expect to see affected individuals in every generation of the pedigree, as it only takes one copy of the dominant allele to express the disorder. Additionally, affected individuals would have at least one affected parent.
Is Down syndrome a genetic disorder or a chromosome disorder?
Down syndrome is a chromosomal disorder. It is caused by having 1 extra chromosome (chromosome 21).
Is hemophilia caused by a dominant allele on the x chromosome true or false?
false
Sex-linked disorders are caused by males having?
Sex-linked disorders are often caused by males having only one X chromosome, as they inherit a Y chromosome from their father. This means that any recessive allele on the X chromosome, which may be associated with a disorder, will be expressed in males since there is no corresponding allele on the Y chromosome to mask its effects. Consequently, conditions like hemophilia and color blindness are more commonly observed in males than in females. Females, having two X chromosomes, may be carriers without showing symptoms if they have one normal allele.
What are autosomal dominant inherited disorders?
An autosomal disorder is one which is caused by a gene or genes on an autosome - a non-sex chromosome. Dominant means that if one allele for the disorder is present, then the person will have the disorder. For example, if H is the allele for Huntington's disease and a person has Hh - they will have the disease. Examples of autosomal dominant disorders are; Huntington's disease, Romano-Ward syndrome, Timothy syndrome and Jackson-Weiss syndrome.
What is a sex linked disorder caused by a recessive allele on the x chromosomes?
colour blindness
What are the genetic disorder caused by deletion from chromosome?
Deletion Syndrome or Williams Syndrome
What causes birthmarks?
well some people believe a birthmark is caused by a recessive allele on the y chromosome
What is the nervous system that breakdown that is caused by an autosomal recessive allele?
One example of a nervous system breakdown caused by an autosomal recessive allele is spinal muscular atrophy (SMA). SMA is a genetic disorder that leads to the loss of motor neurons in the spinal cord, resulting in muscle weakness and atrophy. It is caused by mutations in the SMN1 gene on chromosome 5.
Why can females but not males be carriers of sex linked genetic disorders?
Females have two X chromosomes, allowing them to be carriers of sex-linked genetic disorders on one X chromosome while having a normal allele on the other X chromosome. Males have only one X chromosome and one Y chromosome, so any genetic disorder on their single X chromosome will manifest as the disorder rather than being masked.
What is the disorder caused by having an abnormality on chromosome 21?
Down's Syndrome or trisomy 21.
What feature of a pedigree would allow one to conclude that the disorder was caused by a dominant allele?
If the disorder is caused by a dominant allele, you would expect to see affected individuals in every generation of the pedigree, as it only takes one copy of the dominant allele to express the disorder. Additionally, affected individuals would have at least one affected parent.
Is hemophilia A sex-linked?
Yes, hemophilia A is a sex-linked recessive genetic disorder caused by a mutation in the F8 gene on the X chromosome. It primarily affects males, who inherit the defective gene from their mothers. Females can be carriers of the gene and may pass it on to their children.
