Please HELP///1. A recessive allele is responsible for albinism, an inability to produce or deposit melanin in tissues. Humans and some other organisms can have this phenotype. In each of the following cases, what are the possible genotypes of the father, of the mother, and of their children? a. Both parents have normal phenotypes; some of their children are albino and others are unaffected.

b. Both parents are albino and have only albino children.

c. The woman is unaffected, the man is albino, and they have one albino child and three unaffected children.

In the context of the neural impulse, which of the following is true about the depolarization of neuron membranes?

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?

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time