Experiment 1: a student did a test to see if ultraviolet light
slows plant growth. she followed a logical method and
used a control group and experimental groups. she
repeated her experiment several times and found each
time that plants grow a little more slowly with ultraviolet
light.
experiment 2: a student did a test to see if a new fertilizer
makes roses bloom earlier. she followed a logical method
and used a control group and experimental groups. she
performed one experiment and found that the fertilizer had
no effect.
which experiment is more likely to be reliable, and why?

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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?

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna