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The genotype for a recessive trait found on the female chromosome typically consists of two copies of the recessive allele (homozygous recessive, e.g., "aa") or one copy of the recessive allele and one copy of the dominant allele (heterozygous, e.g., "Aa"). In females (XX), if the trait is located on one of the X chromosomes, a female must have two copies of the recessive allele on both X chromosomes to express the recessive trait. If she has one dominant allele, she will be a carrier but not express the trait.
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What is a male genotype in the zw chromosome system?
In the ZW sex-determination system, which is found in some birds, reptiles, and insects, males have a homozygous genotype consisting of two Z chromosomes, denoted as ZZ. In contrast, females have a ZW genotype, where one chromosome is Z and the other is W. This system contrasts with the XY sex-determination system found in mammals, where males have an XY genotype.
Which is the male genotype in the ZW sex chromosome sytem?
In the ZW sex chromosome system, the male genotype is typically represented as ZZ. In this system, females have a ZW genotype, while males possess two identical Z chromosomes, resulting in the ZZ configuration. This system is commonly found in birds, some reptiles, and certain insects.
A trait that can only be inherited by a male would be a?
Y-linked (sex-linked) - it would only be found on the Y chromosome - and therefore it is impossible for a female to inherit this.X-linked recessive traits are much more likely to occur in males, but it is still possible for a female to have them (if they have a defective gene on both their X chromosomes).
How does hemophilia progress?
Hemophilia is a recessive allele condition. Men can get hemophilia alot easier than women as the allele is found on the XY Chomosome pair. With men. they do not have the extra "tail" on the Y chromosome compared to the XX with a female. If the person has the recessive allele on the X chromosome and this person is male, they will be a hemophiliac as they do not have a 'pair' allele which could be dominant to stop the condition expressing itself. On a female, if there is a recessive (hemophilia) allele on one of the X chromosomes but on the other is a Dominant (normal) allele then she will be a carrier of the faulty gene but will not suffer from the condition herself. If the female have a recessive (faulty) gene on each of the XX chromosomes, then she will be a sufferer of the disease.
What is a z chromosome?
A Z chromosome is a sex chromosome in a species in which the female is heterogametic (i.e. has different sex chromosomes). The counterpart is the W chromosome. In an XY system (e.g. humans), the male is heterogametic, XY, and the female is homogametic, XX. In a ZW system, the male is homogametic, ZZ, and the female is heterogametic, ZW. Examples of species with ZW systems include all birds, many reptiles, fishes and some insects.
What is a male genotype in the zw chromosome system?
In the ZW sex-determination system, which is found in some birds, reptiles, and insects, males have a homozygous genotype consisting of two Z chromosomes, denoted as ZZ. In contrast, females have a ZW genotype, where one chromosome is Z and the other is W. This system contrasts with the XY sex-determination system found in mammals, where males have an XY genotype.
Why is hemophilia more common in males than women?
this disease is caused by a recessive allele that is found only on the x chromosome. a human female has two x chromosomes. a human male only has 1 x chromosome. therefore, a male needs only one recessives allele to have hemophilia, while a female needs two recessive allele. as a result, hemophilia is much more common in males.
Is colorblindness genetic?
Yes. It is a sex-linked recessive trait found on the X chromosome.
In which cell would an inactivated X chromosome be found?
An inactivated X chromosome would be found in the nucleus of a female somatic cell.
Which is the male genotype in the ZW sex chromosome sytem?
In the ZW sex chromosome system, the male genotype is typically represented as ZZ. In this system, females have a ZW genotype, while males possess two identical Z chromosomes, resulting in the ZZ configuration. This system is commonly found in birds, some reptiles, and certain insects.
What do you get when you cross a male hemophiliac with a female hemophiliac?
The gene for hemophilia A is found on the X chromosome (it is a sex-linked recessive disorder). Women have two X chromosomes and men have one X chromosome. A woman with hemophilia (very rare) would have the mutated gene on both of her X chromosomes. This means that all of their children, both male and female would have hemophilia.
What chromosome number is hemophilia on?
Hemophilia is a Sex-linked genetic disorder. It is found on the X chromosome of chromosome 23.A carrier for Hemophilia(represented by H(dominant) or h(recessive)) would look like this:XHXh(Female)*Males are not carriers for hemophilia-They are either affected or they're not*An affected person would look like this:XhXh(Female) XhY(Male)Someone who is neither a carrier nor affected would look like this:XHXH(Female) XHY(Male)
Cystic fibrosis is it monosomy 21?
No. Cystic fibrosis is an autosomal recessive disease caused by mutations found on chromosome 7.
A trait that can only be inherited by a male would be a?
Y-linked (sex-linked) - it would only be found on the Y chromosome - and therefore it is impossible for a female to inherit this.X-linked recessive traits are much more likely to occur in males, but it is still possible for a female to have them (if they have a defective gene on both their X chromosomes).
What is a is a sex-linked trait?
If a gene is found on the X chromosome ( and, less commomly on the Y chromosome), it is said to be a sex-linked trait. Because the gene controlling the trait is located on the sex chromosome, sex linkage is linked to the gender of the individual. Usually such genes are found on the X chromosome. The Y chromosome is thus missing such genes (See Diagram above.). The result is that females will have two copies of the sex-linked gene while males will only have one copy of this gene. If the gene is recessive, then males only need one such recessive gene to have a sex-linked trait rather than the customary two recessive genes for traits that are not sex-linked. This is why males exhibit some traits more frequently than females.
What determines if you are male or female?
TDF (testicular determining factor) is a gene found on the Y chromosome that will determine if one is male or female. If it is present, one is a male. If it is absent, one is a female.
How does hemophilia progress?
Hemophilia is a recessive allele condition. Men can get hemophilia alot easier than women as the allele is found on the XY Chomosome pair. With men. they do not have the extra "tail" on the Y chromosome compared to the XX with a female. If the person has the recessive allele on the X chromosome and this person is male, they will be a hemophiliac as they do not have a 'pair' allele which could be dominant to stop the condition expressing itself. On a female, if there is a recessive (hemophilia) allele on one of the X chromosomes but on the other is a Dominant (normal) allele then she will be a carrier of the faulty gene but will not suffer from the condition herself. If the female have a recessive (faulty) gene on each of the XX chromosomes, then she will be a sufferer of the disease.
