ah o oocyte i ovum i ogenesis, t s-i46 by a typical secondary ooeyte is uu he nu

Question

ah o oocyte i ovum i ogenesis, t s-i46 by a typical secondary ooeyte is uu he number of chromosomes carried by s iii1i. Therefore, n for human species is v. Select the one a typical primary t tills the gaps correctly. 1 , and by a typical i: 46, i: 46, C. i: 46, iii: 23 iv: 23 iii: 23 iv: 46 ii: 46 ii: 46 ii: 23 iii: 46iv: 46 iii: 23 iv: 23 3. What aspect of chromosome behavior most clearly accounts for Mendel's law of segregation? A. crossing-over between homologous chromosomes B. movement of sister chromatids to opposite poles at anaphase II of melosis C. independent alignment of different homo logous pairs on the metaphase 1 during prophase I of melosis spindle movement of homologous chromosomes to opposite poles at anaphase I of meiosis 4. What aspect of chromosome behavior most clearly accounts for Mendel's la of logous chromosomes during prophase I of meiosis independent assortment? A. crossing over between homo B. movement of sister chromatids to opposite poles at anaphase II of independent alignment of different homologous pairs on the metaphase I spindle D) movement of homologous chromosomes to opposite poles at anaphase 1 ot , Y sex meiosis chromosomes. Given that crossing over does NOT happen during spermatogenesis, how many genetically different types of sperm can be generated? male 5. A typical Drosophila melanogaster male has 3 pairs of autosomes and X 6. Normal fruit flies have red eyes. A mutant allele of the X-linked white ey d female fruit fly X a red-eyed male what is predicted am D. 128 C. 64 gene leads to a recessive trait of white eyes.

Explanation / Answer

5) The male Drosophilla melanogaster has an X/Y chromosome and three autosomes labelled as 2,3,4 .

more than 60% of genome appears to be functional nonprotein coding DNA involved in gene expression control.

- Y chromosome is entirely heterochromatic it contains atleast 16 genes with male related functions.

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