Following homologous chromosome is a heterozygous for inversion

Following some statement regarding above abnormality is correct?

A. During meiosis, one chromosome twists once at the ends of the inversion to pair with the other untwisted chromosome

B. Crossing-over within the inversion loop at meiosis connects homologous centromeres in a dicentric bridge.

C. Tension eventually breaks the dicentric bridge, forming two chromosomes with terminal deletions.

D. the RF is zero among genes within the inversion region

#Question id: 5348

#Unit 8. Inheritance Biology

Miniature wings (Xm) in Drosophila result from an X-linked allele that is recessive to the allele for long wings (XL). Following different cross with resulting progeny were possible

Which of the following above offspring is not possible to carry miniature wings?

#Question id: 5239

#Unit 8. Inheritance Biology

Which of the following statements is not true for Hfr strains of E. coli ?

#Question id: 5240

#Unit 8. Inheritance Biology

If bacteria grow in the presence of a large amount of DNase, which of the following recombination process completely inhibited?

#Question id: 5241

#Unit 8. Inheritance Biology

Genes a, b, and c are widely spaced in the bacterial genome. Transducing phage from an a+ b+ c+ bacterium were used to infect a culture of a- b- c- cells, and b+ transductants were selected. Which of the following best describes the predicted genotypes of these transductants?

#Question id: 5242

#Unit 8. Inheritance Biology

Auxotrohic bacteria plating on different medium, it is observed that colonies grow on minimal plus threonine only, no colony on minimal plus leucine and no colonies grow on minimal medium cystein only. What are the actual genotypes of auxotroph?

#Question id: 5243

#Unit 8. Inheritance Biology

Auxotroph culture (His- and Lac-) culture of E. coli was mutagenised. On what media would one spread the mutagenised cells to select prototroph for both His+  and Lac+ cells?