0
Why might a person with an allele for a particular trait may not have a phenotype that shows that trait?
Wiki User
∙ 7y agoWant this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Do Parents with the dominant phenotype cannot have offspring with the recessive phenotypeous for a trait that is?
No. Parents with the dominant phenotype might be heterozygous in their genotype. This means they could carry both the dominant and recessive allele for a trait. So they could both pass the recessive allele to an offspring, who would then have the homozygous recessive genotype and recessive phenotype.
What is only way a recessive trait will be expressed?
if its 2 recessive allels together.
What is the difference between a character and a trait?
There is little difference between the words phenotype and trait. DNA is made up so chromosomes of which there are 23 pairs. Each of these pairs contain alleles; segments of DNA that code for a trait, such as eye colour. Each allele codes for this trait individually however only the dominant allele is expressed. For example one might have an allele for blue eyes and an allele for brown eyes but the allele expressed, the dominant one, is the allele for blue eyes and hence the individual appears blue-eyed. The phenotype is the expressed trait (in the case the individual's blue eyes are the phenotype).Thus an individual contains two alleles for one trait; the expressed allele is the phenotype. However it should be noted that the word trait can be used in a such a way so as to express an individual characteristics that are unrelated to biology. In other words one's mannerisms may also be described as one's traits.
What is the external appearance of an organism by which alleles are present?
Genes code for all genetic physical traits, so allele combinations code everything from metabolism rate to pigment coloring. Everything from the shape of your fingernails to whether you're more likely to get heart disease is an expression of an allele combination.
What environmental factor such as hormone that might affect organism's phenotype?
The type of environmental factor, such as the presence of a hormone, that might affect an organism's phenotype is internal
Why is selective breeding a slow process?
because when you take a gene from another species they don't always turn out the way you whant them to for example; if you take a gene from a blue plant and put it into a red plant you might get a verious of colour because somewhere in the family tree there would be a different colour of parents.
What are the forms of a gene?
I think it might be an allele, but I'm not 100% sure.
Is it possible for 2 alleles to produce four phenotypes?
Yes which ever of the two alleles is dominant, then the phenotype will take the one of the dominant. they can be codominant, so in that case, you might be able to produce 4 phenotypes. it depends if the two alleles create 4
Can you get Cystic fibrosis?
Cystic fibrosis is a genetic disease and can only be inherited through genes. It all depends on your parents alleles. Let's say that the allele for cystic fibrosis is c. If your Mum has the allele Cc it means she is hetrozygous. If you Dad has the same allele he is also hetrozygous. When they had children, the two small c's could come together to make a child with the alleles cc. (This means that the child has cystic fibrosis and has homozygous reccessive alleles.) When they had children their alleles could also come together to make CC (homozygous dominant- this means that person doesn't carry an allele for cystic firbrosis and will never get it. This means that if that person had children with another person who has the alleles CC, their child wouldn't get it), or it could make a child with Cc alleles. The child with Cc alleles wouldn't get cystic fibrosis because the allele big C (dominant allele) over powers the allele small c (reccessive- the cystic fibrosis allele). Although this person doesn't have cystic fibrosis their children might because they carry the allele for cystic fibrosis, which is c.
Is the following sentence true or false all genes show simple patterns of dominant and recessive alleles?
False. Blood type genes have two dominant alleles (A and B), and one recessive (O). When a person gets one A allele and one B allele, they then have the blood type AB. Both are expressed equally. In other genes, a dominant allele might not be completely dominant, allowing the recessive allele to be partially expressed.
How might a geneticist write the alleles to show that tall pea plant has one allele for tall stems and one allele for short stems?
Tt :)
Allele for light hair?
In humans the allele for light hair is recessive.
