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How might a scientist determine whether a trait is a sex-linked by observing the offspring of several genetic crosses?
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∙ 9y ago
no
Geoffrey Huels
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Is hemophilia a dominantrecessiv or a sex linked trait?
Sexlinked and recessive.
Is color blindness a dominant or a recessive trait?
Color blindness is a recessive sex linked trait.
Does sickle cell disease require two allele or multiple alleles?
Sickle cell disease is an autosomal reccessive sexlinked trait so, a female msut have 2 recessive alleles to have the trait and a male needs only one allele (this is because there is no corresponding site for this allele on the Y chromosome. The female can be a carrier of the disorder with the defective allele on one X chromosome and a normal allele on the other X chromosome. Female carrriers can have a mixture of normal and abnormal redblood cells.
Why do sex-linked traits follow patterns of inheritance than other traits?
Sexlinked traits follow a different pattern of inheritance than a non-sex linked trait because of the size difference between the X and y chromosomes. Think about non-sex chormosomes as being the same size, each having the exact same number of genes in the same postions (loci). This means that a person has to have two copies of the recessive genes (one on each homolog of that chromosome) before the trait will be expressed. Lets say A is normal (dominant) and a is abnormal (recessive). People who are aa have the abnormal condition and people who are AA or Aa are normal. The normal ratio is 1 AA:2 Aa:1 aa if both parents are Aa. There is a 25% chance that a child will inherit two abnormal genes and the chance of any sex child will be so affected is exactly the same. When a recessive trait is located on the X chromosome only a female with two X chromosomes has the same number of genes on each X chromosome (the two X chromosomes have the same inheritance behavior as a homolog chromosome in females). In males who inherit the much smaller y chromosome there are many genes on the X chromosome that do not have a matching gene on the y chromosome. This means that recessive traits on the X chromosome that have no matching genetic material on the y chromosome will always be expressed. So, lets say that there is a family where the mother is Aa and the father (who only has one allele on the y chromosome is A. (A is normal and a is abnormal). None of the daughters produced can be aa, because the father will always pass A. Daughters will only be Aa or AA. Sons on the other hand, will get either A or a from the mother and, since the y chromosome has no genetic material at this gene locus the boys will be A normal or a affected at in a 1:1 ratio. If the father is a on his X chromosome, and the mother is AA 100% of the daughters will be carriers (Aa) and all the sons will be normal (A-).
What are sexlinked genes?
Genes that are location on the sex chromosomes.
Is hemophilia a dominantrecessiv or a sex linked trait?
Sexlinked and recessive.
Is it true that sexlinked recessive disorders are most often passed from mothers to sons?
true
Is sickle cell anemia a sexlinked trait?
Nope! The disease is equally in both males and females. This means that it is autosomal.
Is color blindness a dominant or a recessive trait?
Color blindness is a recessive sex linked trait.
What are characteristics of sex-linked traits?
Sex-linked traits are usually passed from mother to son by a defective gene on the X chromosome.Three examples of sex-linked traits are:Color blindnessHemophiliaBaldness
Is breast cancer a sexlinked gene?
absolutely not, these cancer cells can attack both men and women I don't know the answer to the question, but the previous answer, "absolutely not, these cancer cells can attack both men and women" does not answer it. Sex-linked traits/genes can appear in both men and women.
Can males be carriers of sexlinked traits?
No. Carriers are people that carry the gene for something but exhibit no phenotype for it. Since males have no extra copy to hide a recessive trait, they cannot be carriers for sex linked traits.Answ2. Followers of this question should consult say haemophilia in wikipedia.com.
Why can females but not males be carriers of sexlinked genetic disorders?
Several genetic disorders are caused by genes on the X chromosomes.
If you cross white leghorn rooster with rhode island red hen will the chicks be sex links or mixed?
NO, neither breed is sexlinked. What you need to do is breed a Rhode Island Red or New Hampshire rooster with a Barred Rock(Black Stars) or Rhode Island Red or New Hampshire rooster and a Silver Laced Wyandotte, Rhode Island White or Delaware hen(all Red Stars) and you will get sexlinked chicks. The chicks that hatch out solid black are pullets(hens) and the chicks that hatch out black but with a large yellow dot on top of their heads are cockerels(males).This answer is wrong. The rooster has to be the Rhode Island Red and the hen the White Leghorn. The pullets will have reddish fluff and the males will have yellow fluff leading to white feathers.
Can a person be a carrier for a dominant genetic disorder?
Anyone can be a carrier of a recessive genetic disorder (as long as it is not associated with the sex chromosomes) no matter what their gender since "carrier" refers to an individual that is heterozygous for the recessive allele and therefore phenotypically normal. Specifically, sexlinked genetic disorders can be "carried" by a heterozygous female but males (having only one X chromosome) cannot. Males will either be free of the defective gene or be affected.
How long do chocolate Bastin Homing pigeons live?
Chocolate is a regional name used by racing pigeon breeders for a recessive opal pigeon. All racing pigeons can live up to about 12-15 years with a rare number of them living to about 20. And even though you didn't specifically ask this, recessive opal is a non-sexlinked (autosomal) recessive.
