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Traits controlled by recessive alleles on the x chromosome are more common in males than in females explain why?
Wiki User
∙ 11y ago
Males only have one X chromosome, so even if the gene on that chromosome is recessive there is no other gene that could dominate it.
Females have two X chromosomes, so if the gene on that chromosome is recessive there is still a chance that the gene on the other chromosome could be dominate and override it.
Jose Luettgen
Wiki User
∙ 11y ago
Hence females have 2 genes one on each of the X chromosome controlling the respective phenotype(appearance).
Males only have one gene on the X chromosome controlling the phenotype because the Y chromosome is not known to control any phenotype linked to the X chromosome.
Hence traits controlled by recessive alleles on the X chromosome are more common in males than in females.
For a recessive trait to show in a female, she should inherit two X chromosomes that contain the recessive genes.
Where as for a male to inherit a recessive trait, he only has to inherit one X chromosome which contains the recessive gene.
Hope this helps!
Wiki User
∙ 12y agoBecause women have two X chromosomes. Men have one.
The X chromosome is in the 23rd chromosome pair. If the pair is XX, its a female. If XY, its male. That shows that its a 50/50 probability of having a boy or girl.
Wiki User
∙ 8y agoMales only have one X chromosome, so even if the gene on that chromosome is recessive there is no other gene that could dominate it.
Females have two X chromosomes, so if the gene on that chromosome is recessive there is still a chance that the gene on the other chromosome could be dominate and override it.
Wiki User
∙ 13y agoThey have no second X chromosome to lend a dominant genotype/phenotype in it's place; therefore, they must use the recessive provided on their only X chromosome.
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In pea plants green pod color is controlled by a dominant allele Yellow is controlled by a recessive allele Explain why a plant with yellow pods can never be a hybrid?
Because in order to be yellow the only 2 alleles you can have are the 2 recesisve ones, therefore you will always have yellow
Many inherited disorders of humans appear in children of parents who do not have the disorder how can you explain that the parents do not have the disorder but the child does?
The disorder is controlled by a recessive factor.
Explain how crossing over can unlink genes?
crossing over can unlink genes because when crossing over occurs it a portion of one chromosome is replaced by a region of a homologous chromosome and during this the alleles that were presently on that linked gene could possibly be separated
A test cross made with a cat that may be heterozygous for a recessive trait what is the presumed genotype of the cat explain?
A test cross made for a heterozygous recessive trait would show a dominant gene and a recessive gene. The cat would have one dominant gene (A) and 1 recessive (a).
Will both of my children have the same color eyes?
maybe yes maybe no. it depends on the genes passed on. There are more people in the general populous with brown eyes than any other colour added up - individual to one chosen colour. The below is from http://www.answers.com/topic/eye-color Brown versus blue eye color is believed to be controlled by two genes on chromosome 15, called BEY1 and BEY2. Green versus blue eye color is believed to be controlled by a gene on chromosome 15, called GEY. In this system, blue is believed to be recessive to both brown and green. The protein products of these genes are unknown, however, as is the number of alleles possible for each. Furthermore, these three do not fully explain inheritance of all eye colors. More genes, which likely modify the action of these three, are probably involved. I have 3 kids with blue eyes and one with brown! I have brown eyes and my husband has blue. Grandparents have two with brown, one with hazel and one with blue. You just can't tell.
What alleles is the recessive alleles explain why?
it would be t recie
Explain how the inheritance of traits is controlled in organisms?
The inheritance of traits is controlled in organisms by genes. These genes come from either one or two parents. The alleles determine what traits are dominant or recessive in the new organism.
Explain segregation of alleles using pea plants?
if the pea plant has 2 recessive alleles then the plant is gonna come out short.but if it has 1 recessive and one dominant allele then the plant turns out tall, because the dominant allele can be present without the recessive allele.
Is there any evidence that the traits shared by most of the population is not controlled by a dominant allele explain?
If the allele is beneficial then recessive alleles will drive to fixation in the population. Sickle cell trait is a fair example of this.
In pea plants green pod color is controlled by a dominant allele Yellow is controlled by a recessive allele Explain why a plant with yellow pods can never be a hybrid?
Because in order to be yellow the only 2 alleles you can have are the 2 recesisve ones, therefore you will always have yellow
Using the terms dominant recessive explain the difference between genotype and phenotype?
No, I think you have your terms confused.The terms "dominant" and "recessive" are applied to alleles of a genotype. A genotype is an expression (using upper- and lower-case letters) that shows what alleles an organism has for a particular locus. The two alleles (in most cases) inherited (one from mother and one from father) can either be dominant or recessive. The recessive allele is not fully expressed in the presence of the dominant allele and is only expressed when there are two recessive alleles. The genotype could be called "recessive" I suppose if the genotype is homozygous recessive. But remember that two recessive alleles as a genotype is only one possibility - in which case you can't say the "genotype is recessive".The phenotype is dependent on the genotype. If present, the dominant alleles (in simple Mendelian genetics) will determine the phenotype - what the organism's trait or characteristic is. The phenotype will never be what is coded by the recessive allele unless the genotype is two recessive alleles.
How does the work of Gregor Mendel explain the rules of Heredity?
It explains the simplest form of genetic inheritance involving traits controlled by single genes having only dominant and recessive alleles. It does not directly explain genetic inheritance involving more complex traits (e.g. multiple interacting genes, genes having many different alleles, gene suppression).
Many inherited disorders of humans appear in children of parents who do not have the disorder how can you explain that the parents do not have the disorder but the child does?
The disorder is controlled by a recessive factor.
Cattle with both white hair and red hair are?
Mendel's principle of dominant and recessive alleles doe not explain why the heterozygous chickens have both red and white hair
Explain how crossing over can unlink genes?
crossing over can unlink genes because when crossing over occurs it a portion of one chromosome is replaced by a region of a homologous chromosome and during this the alleles that were presently on that linked gene could possibly be separated
Explain why a trait inherited by incomplete dominance such as the color of appoloosa horses is not a blend of two alleles?
The inheritance of a dominant and a recessive allele results in a blending of traits to produce intermediate characteristics.
Explain how the inheritance of traits is controlled in organisms Use the term genes and alleles in you explanation?
The most dominant traits are the ones that control organisms genes.
