Metabolic rate is regulated by thyroid hormones. The hypothalamus secretes thyroid-releasing hormone (TRH), which stimulates the pituitary gland to release thyroid-stimulating hormone (TSH). The TSH then stimulates the thyroid to release thyroid hormones. The diagram shows the thyroid hormone pathway, which is a negative feedback mechanism. Which would most likely occur if too much thyroid hormone is released?

The hypothalamus would not release TRH.
TSH would stimulate the thyroid.
The thyroid gland would increase in size.
The pituitary gland would secrete more TSH.

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?

The allele for curly hair is incompletely dominant. if a mother is homozygous for curly hair and the father is homozygous for straight hair, what percentage of the offspring will exhibit characteristics of both parents? 25 percent 50 percent 75 percent 100 percent

Identify the terms using the following picture. principle of dominance item 1 can be described as the . item 2 can be described as the . the "p" represents from one parent.