104. Types of gametes formed by the plant with genotype AABbccDdee :- (1) 2 (2) 4 (3) 32 (4) 64

7-5. In corn a pair of genes determines leaf shape and another pair determines pollen shape. A ragged-leafed plant with round pollen was crossed to a ragged-leafed plant with angular-pollen, and the resultant progeny were classified as follows: Class Phenotypes 186 ragged-leaf round-pollen 11 IV 174 ragged-leaf angular-pollen 57 smooth-leaf round-pollen Total 63/480 smooth-leaf angular-pollen (a) Using alphabetical letters of your choice, designate the genes for the different leaf and pollen characters. (b) On the basis of the symbols given in (a) 1 provide genotypes two parents. (c) (forth)/(nbers) According to your hypothesis what would you have expected for each of the four classes of progeny? (d) After re viewing Chapter 8, use the chi-square method (p. 132) to test your hypothesis and indicate whether you accept or reject it.

2.3 Meiosis This process is more complicated than what occurs in mitosis. In meiosis, the genetic complement is cut in half so that the daughter cells each have half the number of chromosomes as the original cell. Because of this, meiosis is often called a reduction division. The genetic complement is now half the original, meaning one copy of each chromosome pair ends up in each daughter cell. This is the haploid number. This process produces the gametes, the sperm, and the ovum, and it takes place in the testes and ovaries, respectively. Two divisions, meiosis I and meiosis II, make this possible. Prior to meiosis, the chromosomes replicate themselves, again becoming double stranded. Thus, there are 46 double-stranded chromosomes when meiosis I begins. During meiosis I, the homologous chromosomes pair with each other, join together, and intertwine. The homologous chromosome pairs separate, with one homologue moving into one daughter cell, while the other homologue moves into the…

Analyze the karyotype shown. Indicate if it is a chromosomal male or achromosomal female. If the karyotype is normal, write the word normal under name or description. If the karyotype is abnormal, name or describethe disorder.