Aperson with a genotype of hbss has sickle cell disease. a person with a genotype of hbas allele carries the sickle cell trait. a person with a genotype of hbaa does not have sickle cell disease and does not carry the trait. the punnett square shows the genotype of two people carrying the sickle cell trait. hb a s a aa as s as ss what are the chances that their offspring will have sickle cell anemia? 0% 25% 50% 100%

25%

Explanation:

Phenotypic ratio of progeny = 3 normal : 1 affected.

So, 25% of the progeny is affected with sickle cell anemia when two carrier people serve as parents.

rising sea temps which are causing coral reefs to bleach and die out

glaciers are melting causing sea levels to rise wgich could flood out land

explanation:

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.