Mistletoe seeds stick to bark. When the seed germinates, a root-like part digs through the bark into the sap-filled living wood of the
tree. The mistletoe absorbs water and nutrients from the sap. Mistletoe slows the growth of trees and, in large numbers, may kill the
tree. Which of the following best explains the relationship between trees and mistletoe?
A.
Mistletoe is a parasite that lives on trees by taking some of the trees' food and water.
B.
Trees provide shelter for mistletoe, and mistletoe helps the trees reproduce.
C.
Mistletoe is a predator that lives on trees by consuming them for food.
D.
Trees provide shelter for mistletoe, and mistletoe provides food for the trees.
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What role do traits play in affecting an organisms ability to reproduce? finches

Approximately 90% of all cases of polycystic kidney disease are inherited in an autosomal dominant fashion. the disease is typically related to mutations to genes (pkd1 and pkd2). pkd genes can be found on chromosome 16. the disease occurs in approximately 1: 800 to 1: 1000 people. here is a hypothetical example. the dominant allele d will cause the development of pkd. the recessive allele is known as d. what genotypes would correspond to suffering from pkd? dd, dd what genotypes would correspond to being normal (not suffering from pkd)? dd consider that 1: 1,000 people have pkd in your population of 325million. consider that pkd is inherited in an autosomal dominant fashion. show you math for all of the following questions: what is the genotypic frequency for dd? what is the genotypic frequency for dd? what is the genotypic frequency for dd? what is p? what is q? how many people in your population would have pkd?

Each hereditary trait corresponds to