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Most copies of harmful recessive alleles are carried by?
individuals that are heterozygous for alleles
Is color blind dominant or recessive?
recessive
Is cooley anemia sex-linked trait or autosomal trait?
Autosomal recessive
How do you know if a trait is sex linked dominant or sex linked recessive?
get a test
If a daughter expresses an x-linked recessive gene she inherited the trait from?
For a female to express an X linked recessive gene, she must have inherited it from both parents. Every female (without disease) has two X chromosomes: XX, while males have an X and a Y: XY. A recessive gene is one that will not be expressed if there is a copy of the dominant gene present. sex linked genes have their own special set of rules because the sex chromosomes are the only ones which vary by presence or absence between different people. Because a male only has one X chromsome, he will express all the genes on that chromosome; this can be used to determine if a gene is sex linked and recessive/dominant. A recessive gene will not be expressed if there is a dominant gene for that allele present. This means that if a female (XX) is expressing an x-linked recessive trait, she must have two recessive genes for that trait; therefore she inherited the trait from both parents.
Why are males most likely to express a sex linked recessive trait?
Males have only one X chromosome, so a recessive X-linked trait will be displayed in the phenotype [visible on the outside]. Females have two X chromosomes, so both of the chromosomes must have the trait for it to be displayed on the phenotype.
In a hybrid individual the trait that is covered and not expressed is the what trait?
recessive
Why are males most likely to express a sex linked trait?
Males have only one X chromosome, so a recessive X-linked trait will be displayed in the phenotype [visible on the outside]. Females have two X chromosomes, so both of the chromosomes must have the trait for it to be displayed on the phenotype.
Why do x linked conditions appear more frequently in males than females?
Because males have an X and Y chromosome. If the trait is X-linked (recessive), there is nothing to mask the expression. On the other hand if a woman has an x-linked recessive allele and a dominant one, the dominant trait is the one that will be expressed.
Most copies of harmful recessive alleles are carried by?
individuals that are heterozygous for alleles
Is color blind dominant or recessive?
recessive
What has a gene for a certain trait but does not express that trait itself?
recessive
Is alzheimer's an autosomal dominant trait an autosomal recessive trait an X linked recessive trait or a chromosomal error?
Alzaymrs is ottosomal dominent
Is cooley anemia sex-linked trait or autosomal trait?
Autosomal recessive
Is an x linked dominant trait the same as an x linked recessive gene?
An X-linked recessive trait is coded for by a gene on the X-chromosome and is not dominant (is canceled out by the presence of a different allele). Example of X-linked recessive traits are; Haemophilia A & B and Duchenne muscular dystrophy.
How do you know if a trait is sex linked dominant or sex linked recessive?
get a test
Is hemophilia a dominantrecessiv or a sex linked trait?
Sexlinked and recessive.
