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What is the Term that refers to a trait coded for by an allele on a sex chromosome?
The term that refers to a trait coded for by an allele on a sex chromosome is "sex-linked trait." These traits are often associated with genes located on the X or Y chromosomes, with X-linked traits being more common due to the presence of more genes on the X chromosome. Conditions such as hemophilia and color blindness are examples of disorders caused by X-linked alleles.
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If a human baby boy inherits a recessive allele from his mother in which circumstance would he most likely show the trait coded for by the recessive allele?
A human baby boy would most likely show the trait coded for by a recessive allele if he inherits the same recessive allele from his father as well. Since males have one X and one Y chromosome, the trait would manifest if the recessive allele is on the X chromosome and there is no dominant allele present from the Y chromosome. If the mother is a carrier (heterozygous) or expresses the trait (homozygous recessive), the boy could inherit the recessive allele and exhibit the trait.
What is dominant chromosome?
A dominant chromosome refers to a chromosome that carries a dominant allele, which expresses its trait even when paired with a recessive allele. In genetics, dominant alleles can mask the effects of recessive alleles in a heterozygous organism. This means that if an individual has one dominant allele for a trait, that trait will be expressed, regardless of the presence of a recessive allele. Dominance is a key concept in Mendelian genetics, influencing inheritance patterns.
Which allele combination represents a female who has a heterozygous sex-linked trait?
A female with a heterozygous sex-linked trait typically has one dominant allele and one recessive allele for that trait. Since sex-linked traits are often associated with the X chromosome, the allele combination would be represented as XᴴXʰ, where Xᴴ is the X chromosome carrying the dominant allele and Xʰ is the X chromosome carrying the recessive allele. This combination indicates that the female expresses the dominant trait but is a carrier of the recessive trait.
Can a sex-linked allele be dominant?
Yes, a sex-linked allele can be dominant. For example, if a gene on the X chromosome is dominant, females who inherit the allele will express the trait, while males only need one copy of the dominant allele to show the trait since they have only one X chromosome.
What is genotype for a recessive trait found on the female chromosome?
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.
If a human baby boy inherits a recessive allele from his mother in which circumstance would he most likely show the trait coded for by the recessive allele?
A human baby boy would most likely show the trait coded for by a recessive allele if he inherits the same recessive allele from his father as well. Since males have one X and one Y chromosome, the trait would manifest if the recessive allele is on the X chromosome and there is no dominant allele present from the Y chromosome. If the mother is a carrier (heterozygous) or expresses the trait (homozygous recessive), the boy could inherit the recessive allele and exhibit the trait.
What is dominant chromosome?
A dominant chromosome refers to a chromosome that carries a dominant allele, which expresses its trait even when paired with a recessive allele. In genetics, dominant alleles can mask the effects of recessive alleles in a heterozygous organism. This means that if an individual has one dominant allele for a trait, that trait will be expressed, regardless of the presence of a recessive allele. Dominance is a key concept in Mendelian genetics, influencing inheritance patterns.
Which allele combination represents a female who has a heterozygous sex-linked trait?
A female with a heterozygous sex-linked trait typically has one dominant allele and one recessive allele for that trait. Since sex-linked traits are often associated with the X chromosome, the allele combination would be represented as XᴴXʰ, where Xᴴ is the X chromosome carrying the dominant allele and Xʰ is the X chromosome carrying the recessive allele. This combination indicates that the female expresses the dominant trait but is a carrier of the recessive trait.
What is an recessive trait?
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.
Which trait will a male exhibit if he carries a recessive allele on the X chromosome?
A male carrying a recessive allele on the X chromosome will exhibit the recessive trait. This is because the Y chromosome generally does not have matching genes for the X chromosome, unlike the other 22 pairs if chromosomes in the nucleus.
Can a sex-linked allele be dominant?
Yes, a sex-linked allele can be dominant. For example, if a gene on the X chromosome is dominant, females who inherit the allele will express the trait, while males only need one copy of the dominant allele to show the trait since they have only one X chromosome.
What is genotype for a recessive trait found on the female chromosome?
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.
How many copies of a sex linked recessive allele does a male need to exbit the trait?
A male only needs one copy of a sex-linked recessive allele to exhibit the trait because males have only one X chromosome. If the allele is present on the X chromosome, it will be expressed in males.
Snice the allele for colorblindness is located on the x chromosome which type of trait is colorblindness?
Sex linked
What is an X linked traits?
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.
What in term of applied to the trait that is expressed irregardless of the second allele?
The term applied to the trait that is expressed in regardless of the second allele is dominant. In contrast, the term recessive refers to a trait that is expressed when the second allele is identical.
What is the difference between a gene allele Chromosome and trait?
Alleles are alternate versions of genes that code for certain phenotypes, or traits. The traits of an individual are a result of the interaction between their genotype (alleles) and the environment.
