In rabbits, an allelic series helps to determine coat color at the color C locus: C (full color), cch(chinchilla; gray color), ch (Himalayan; white with black extremities), and c (albino; all white). The C allele is dominant to all others, cch is dominant to ch and c, ch is dominant to c, and c is recessive to all the other alleles. What types of progeny would you predict from a cross of Cch x cch

1 Full color : 1 Himalayan

Explanation:

This question is depicting the multiple allele phenomenon in rabbits where four different alleles are responsible for coat color. The alleles are:

- C codes for full color

- cch codes for chinchilla; gray color

- ch codes for Himalayan; white with black extremities, and

- c codes for albino; all white

However, according to the question, the order of dominance of these alleles is: C > cch > ch > c. Hence, in a cross between Cch x chc, the following gametes will be produced by each parent:

Cch - C and ch

chc - ch and c

Using these gametes in a punnet square (see attached image), the following genotypic proportion of offsprings will be produced;

Cc = full color

Cch = full color

chc = Himalayan (white with black extremities)

chch = Himalayan (white with black extremities)

Hence, full color and Himalayan are the types of progeny that will be predicted from the cross.

a. the production of carbon dioxide through the process of photosynthesis

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!