Sickle Cell Anemia is caused by co-dominant alleles. The allele for normal hemoglobin can be represented as N and the allele for the sickle cell hemoglobin
can be represented as S. It has been found that sickle cell patients are resistant to
malaria, a deadly disease. If you cross two people who are heterozygous for sickle
cell anemia, what percentage of their offspring will have sickle cell anemia?

What’s the student’s scientific question

Fill in the blank 1. digestion occurs in the small intestine through the action of enzymes. 2. urea, excess water, and other waste materials are eliminated in a water fluid called 3. can cause infections by injecting dna or rna into hosts. 4. the human immune system produces in response to a vaccine, which later can bind to and destroy a pathogen if it invades. 5. are structures that link bone to bone at a joint 6. in the heart, blood flows from the right atrium to the right ventricle, where it is pumped to the the words i can use are: lymphocytes gliding pivot gas urine absorption dermis fulcrum lungs chemical viruses capillary vertebrae esophagus tendons antibodies synapses ligaments kidneys pathogens

Land conservation is a worldwide priority. there are several methods to prevent the loss of land due to a variety of reasons. which method is not a way to conserve land? a) sea walls b) rainwater harvesting c) limits on clear cuts of forests d) cut and burn methods of clearing land