In tomatoes, yellow fruit and dwarf vines are recessive traits. Red fruit and tall vines are dominant. Complete a Punnett square and answer the questions below for a cross between a homozygous dominant red and homozygous dominant tall plant crossed with a heterozygous red and dwarf plant. Use the letters R and r for fruit color, and T and t for height. What is the phenotype ratio?

Asmall population of chimpanzees lives in a habitat thant undergoes no change for a long period of time. how will genetic drift affect this population

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?