Some tetraploid species has a base set of 14. Cine of its cells undergoes normal meiosis 1 but experiences non-disjunction of one chromosome during meiosis II.

Genetics 329 F2122 Problem Set 1. Some tetraploid species has a base set of 14. Cine of its cells undergoes normal meiosis 1 but experiences non-disjunction of one chromosome during meiosis II. a. How many total chromosomes will be present in each of the four daughter cells generated by this germ cell? b. Three types of autosomal trisomics are occasionally observed in this species. Based on known gene numbers, which autosomal chromosomes were likelyr involved in non-disjunction that created aneuploid offspring? Chr Coding i Chr Coding Chr Coding Cenes . Cenes . Cenes 1 1991 | I5 659 11 513 2 1956 | 2 1195 12 212 3 243 l 9 E92 13 929 4 253 l 9 129′? X 991 5 131-1 j 19 295 Y 55 2. You decide to create a “pomato” by hybridizing a diploid tomato {it I 12} and an autotetraploid potato {it I 12], and then later inducing total non-disjunction in one of the hybrid offspring to double chromosomes and "rescue” it. a. How many chromosomes will be present in the hybrid before chromosome doubling? b. Will the hybrid offspring likely be sterile before chromosome doubling? c. How many base sets will be present after chromosome doubling and what ploidy level does this correspond to? d. Would you stand a better chance of creating a successful and fertile hybrid if you started with a diploid tomato and an autouiploid potato?