During the isolation of somaclonal variants such as cell selection contain positive selection, describe by which method that the wild type cell are killed by selection agent while the variant cells remain alive?

#Question id: 4922

#Unit 8. Inheritance Biology

Following statement is correct for Genetic maternal effect. 

A- Characteristics are determined by autosomal genes

B- Inherited according to Mendel’s principles

C- Phenotype of offspring determine by protein factor that is inherited via egg cytoplasm

#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?

#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: 4799

#Unit 8. Inheritance Biology

You set up a mapping cross involving your favorite gene (YFG) in Neurospora and determine the following octad types: 4:4 arrangement 83; 2:4:2 arrangement 7; 2:2:2:2 arrangement 10. What is the distance between your gene and the centromere?

#Question id: 4801

#Unit 8. Inheritance Biology

You set up a mapping cross involving two genes in Aspergillus and determine the following percentages of tetrad types: parental ditype 51%, nonparentalditype 49%. What can you say about your genes?

#Question id: 4802

#Unit 8. Inheritance Biology

Why is tetrad analysis useful for studying genetics?