The karyotype for trisomy 21 illustrates an example of a genetic mutation caused by

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

Look at the photo of the leaf. which term best describes this leaf?

Need an answer asap 45 points and brainlest to the first person to answer why do scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record. must be in sentence form how can scientific theories on evolution and the fossil record change over time? must be in sentence form