Your friends Ben and Jane are contemplating having children and seek your genetic counsel. Ben and Jane are unrelated, but both have younger brothers with the same, extremely rare genetic trait. (In fact, Ben and Jane met at a support group meeting for children and families of children with this rare disorder.) Ben’s parents and Jane’s parents are all unaffected.          

Assume that the trait is autosomal recessive with complete penetrance. What is the probability that Ben and Jane’s first child will be affected with the trait? If not affected, what is the probability that the child is a carrier?

TLS Online TPP Program

#Question id: 15168

#Unit 2. Cellular Organization

Cyanobacteria comprises a large and morphologically heterogenous group of

TLS Online TPP Program

#Question id: 15169

#Unit 2. Cellular Organization

These photoorganotrophic heterotrophs (photoorganoheterotrophs) are common inhabitants of

TLS Online TPP Program

#Question id: 15170

#Unit 2. Cellular Organization

Chemoheterotrophs are the bacteria which utilize

TLS Online TPP Program

#Question id: 15171

#Unit 2. Cellular Organization

Fermentative microorganisms form organic acids from carbohydrates, whereas chemolithotrophs like Thiobacillus oxidize reduced

TLS Online TPP Program

#Question id: 15172

#Unit 2. Cellular Organization

Nitrifying bacteria such as Nitrosomonas and Nitrosospira are soil and aquatic bacteria of considerable ecological significance. They oxidize ammonia to nitrite. They are called as

TLS Online TPP Program

#Question id: 15173

#Unit 2. Cellular Organization

Microbes such as Chlorobium and Chromatium develop as visible green and purple zones. These microorganisms use