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Which genes are expressed even when present on only one chromosome?
Genes located on the X chromosome in males are expressed even when present on only one copy. This is because males have only one X chromosome and it is always active. In females, one of the two X chromosomes is randomly inactivated during early development, ensuring balanced gene expression.
Why are some genes are called dominant?
cause they can fool bi**
What are the difference between dominant and recessive genes?
Dominant genes will cover up recessive genes. Take a simplified version of eye color for example. Brown is dominant and blue is recessive. Someone might have the allele for both brown and blue, but their eyes will be brown because of the dominent brown gene. If there are two parents that carry the recessive gene, neither will be blue eyed, but they will have a chance of having a blue eyed child if both pass on the recessive gene.
What is the extract of RNA?
RNA is the expressed form of a gene (which is DNA encoded). By isolating RNA, it is possible to determine which genes were being expressed and to what relative (or even absolute) level.
A chromosome is made up of even smaller bodies?
It is made up of genes.
Is it true that recessive alleles are never present when dominant alleles are present?
No, recessive alleles can still be present in an individual's genetic makeup even when dominant alleles are present. In this case, the recessive allele may not be expressed phenotypically, but can still be passed on to offspring.
Why do males and females express X-linked alleles differently?
X-linked recessive traits that are not related to feminine body characteristics are primarily expressed in the observable characteristics, or phenotype of men. This is due to the fact that men only have one X chromosome. Subsequently, genes on that chromosome not coding for gender are usually expressed in the male phenotype even if they are recessive since there are no corresponding genes on the Y chromosome in most cases. In women, a recessive allele on one X chromosome is often masked in their phenotype by a dominant normal allele on the other. This explains why women are frequently carriers of X-linked traits but more rarely have them expressed in their own phenotypes.
Why do the recessive genes do not disappear from the population?
Recessive genes can persist in a population because they can be carried in individuals without being expressed. These hidden recessive genes can be passed down through generations, only showing up if inherited from both parents. Additionally, genetic diversity can help maintain recessive genes in a population even if they are not expressed in every generation.
Which allele is expressed even if only one copy is present in genotype?
dominant alleles
Why is hemophilia rarely expressed in females?
Because hemophilia is a disease linked to a recessive gene on the X-chromosome, females have another X-chromosome to block out the diseased one. However, males have only one X-chromosome, so they are more often subject to hemophilia.
How can two species have the same chromosome number yet have very different attributes?
See, The difference in two species comes from there genetic code (genes) and not from the number of chromosomes present in their cell.. So even if two species have same number of chromosomes BUT different genetic code then they ARE LIKELY TO BE DIFFERENT!! hope you have got your answer..:)
What are alleles for a particular trait that are always expressed are said to be?
Dominant alleles. Dominant alleles will always be expressed in the phenotype, even if only one copy is present in the genotype.
