Question

31. In the experiments conducted by McClintock's with corn plants with the herozypous genotype C Sh We Dich wx, generation of segments in corn seeds with the recessive phenotype for the Colored colorless (C and a pair of alles was the result of A) breakage of the chromosome at the locus B) Insertional inactivation of the Calle with formation of a c a lle C) inactivation of the Calele by a pont mutation D) excision of Ds from the cms alle E) mutational inactivation of the Os element 32 Awe-eyed X- drecessive character female frullty is maled to a red eyed male. One of their progenisa red-eyed male What is the mostly set of chromosomes of this re red eyed on? treat recall the determination mode in Drop is NOT the same as in humans A) XXY DI XXX EXYY the forget 93 In The Holiday model of recombination was the correct HF) heteroxtuple DNA formation SB) strand breakage nicking) Mismatcher BP formation of a branch point dayunca AC airment of monster chromads AIHE SORPAC B S MR SPAC- C) AC SB MR BP HF D) MR BP AC HF 59 E) AC SB BP HE MR 34 in ocells of the genotype POZYPOZY production of galactosidase and permase wil be respectively A) constitutive induce inducibe constutive C) constitutive constitutive Di lethal conditional 35. Which of the following may result in mitic abnormality leading to writy or non viable progeny A) Heterozygous translocation B) Heterozygous inversion C) Aneuploidy DI Triploidy All of the above phase of me oss in a human with Down Syndrome (the 35. How many chromosomes would be found her ost common type A) 22 24 C) 24 D) 22 or 23 E) 23 24

Please solve problem 31.

Answer 1

the C allele is dominant and it produces purple kernels bu the heterozygotes were colourless due to the insertion of the Ds element to the C allele, insertion of the Ds transposable element inactivates the C allele so the functional product cannot be produced so the answer is B) insertional inactivation of the C allele with the formation of C-m(Ds) allele.