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 80% penetrance. What is the probability that Ben and Jane’s first child will be affected?

#Question id: 4916

#Unit 8. Inheritance Biology

Kappa particles indicate

#Question id: 4917

#Unit 8. Inheritance Biology

Cytoplasmic male sterility in maize is manifestation of interaction between

#Question id: 4918

#Unit 8. Inheritance Biology

The two organelles responsible for cytoplasmic inheritance among eukaryotes are

#Question id: 4919

#Unit 8. Inheritance Biology

Genes for cytoplasmic male sterility in plants are generally located in

#Question id: 4920

#Unit 8. Inheritance Biology

In Neurospora, the mutant stp exhibits erratic stop-and start growth. When a female of stp strain is crossed with a normal strain acting as a male, all progeny individuals' showed stp mutant phenotype. However, the reciprocal cross resulted in all normal progeny, individuals. These results can be explained on the basis of

A. Uniparental gene contribution

B. Nuclear inheritance with concept of dominance

C. Sex link character

D. stp mutation may be located in chloroplast DNA

The most appropriate statement or combination of the above statements for explaining the experimental results is:

#Question id: 4921

#Unit 8. Inheritance Biology

Shell coiling in snail determine by genetic maternal effect. S for dextral and s for sinistral.  Following cross allowed between

Which of the following progeny not have SS genotype?