Answer:
a) B b) D c) A
Explanation:
Alleles exhibit dominance over each other leading to the dominant one being express and the recessive one not expressed. Alleles are variants (different) genes that codes for a specific trait.
At Anaphase 1 homologous chromosomes separate leading to each being pulled to the opposite pole and the sister chromatids remain together while the homologs experience segregation.
Dominant trait is the one that is expressed. It usually exercise dominance over recessive trait until it is removed from the recessive trait and replaced with another recessive gene before it is expressed.
Answer:
The correct answer is codominance.
Explanation:
It is given in the question that the genotype of Martin is HbS/HbS, and is exhibiting sickle cell anemia with unusual hemoglobin. On the other hand, the genotype of Cindy is HbA/HbA, which shows that she possesses normal hemoglobin. Both of them have a child, Mary who as usual is exhibiting genotype HbS/HbA.
This shows that Mary has acquired both the alleles for sickle cell anemia from her parents, and thus, is demonstrating both unusual and normal form of hemoglobin. Sickle cell is a condition that does not demonstrate the phenomenon of complete dominance, as it is a codominant trait.
A phenomenon in which the features of both the alleles are expressed in the phenotype is termed as codominance. Hence, Mary is demonstrating a codominance pattern.
Some advantages and disadvantages of growing tall as a plant are as follow: Tall, Growing tall can lead to larger amounts of wind pressure on its stalk so it can not stand up easily. More birds and other flying insects will be driven to land on it and feed on it. It also has less protection from things around it. Some advantages are it will get sun easier, it will be able to spread its offspring easier and it will not get trampled. Some advantages and disadvantages of growing short are as follows: Short, Growing short can lead to less animals able to feed on your fruit and spread your seed. They can be trampled easier and move things tend to hide in its flourish of leaves. It gets eaten by more since it is easier to reach. Some advantages, it will not have very much wind blowing on it at all times, it has protection from other elements because it is close to the ground.
It is false that all of the waters of the Earth form the biosphere.
