As you have determined, the f1 is heterozygous for four loci that affect fruit segment number (a+ a 0 b+ b 0 c+ c 0 d+ d 0). This means that the f1 can produce 16 distinct gamete types, which contain different numbers of additive alleles (designated with the "+" superscript). Sort the 16 gamete types into bins based on the number of additive alleles they contain.

Layer r contains a well-known index fossil that is 100 million years old. based on this information and the principle of superposition, a. layers t and m are older than 100 million years, and layers x and g are younger than 100 million years. b. layers t, m, x, and g are all older than 100 million years. c. layers t and m are younger than 100 million years, and layers x and g are older than 100 million years.