True should be the answer.
Answer:
Explanation:
If any recessive phenotypic individuals result from the cross, then the unknown individual must carry the recessive allele, and have the heterozygous genotype. A testcross helps reveal the genotype of an organism when that organism shows the dominant trait, such as agouti coat color in rats.
Chemical elements are important to living organisms because they make up the organic molecules that are found in all living things
People with two copies of the sickle cell gene have the disease. People who carry only one copy of the sickle cell gene do not have the disease, but may pass the gene on to their children. Abnormal hemoglobin, called hemoglobin S, causes sickle cell disease (SCD). The problem in hemoglobin S is caused by a small defect in the gene that directs the production of the beta globin part of hemoglobin. This small defect in the beta globin gene causes a problem in the beta globin part of hemoglobin, changing the way that hemoglobin works.
The answer is
B) Evolution
