Answer:
True
Step-by-step explanation:
This is because in the two hetero zygote parents the SS traits are dominated by the dominant A geneotype. Therefore in the AS parents the S-genotype could not manifest, and therefore recessive.
However,when the two recessive genes are crossed in the parents at meiosis 1,the recessive genes were randomly selected to give the SS genotype to the parents.This is an example of autosomal recessive pattern. The chances of inheritance of the gene for the two parents is 25% based on Mendelian's patterns
it is an inherited disorder in which the the percentage of normal biconcave shape Hb is low in the blood, but more of sicked shape ,therefore given the blood of the individual sickle shaped RBCs. It is due to genetic mutation due to single nucleotide substitution of amino acid Glumatic acid with Valine.
The reduction of the surface area for the transport of oxygen,leads to the deficient oxygen supplies to the tissues,and clogging of blood vessels by sickle rbc leading to pains