Question

(2points) You are studying a species of alga. Haploid cells have 17 chromosomes. Is this surprising that this is an odd number? Why or why not? (2points) You are studying a species of single-celled yeast. For a group of cells that you are studying, you notice that during mitosis, some cells have 5 groups of chromosomes on the metaphase plate and others have 10 groups of chromosomes. What do you think is going on? 2. You are studying a species of worm in which females and males each have three pairs of chromosomes. Recombination occurs in males but not in females. How many different egg genotypes (that is, how many genetic combinations) can a single female produce? (1 point) How many different sperm genotypes can a single male produce? (Ipoint) 3. Your friend is studying a newly discovered species of lizard. She obtains the following karyotypes for a male (left) and a female (right). How do you think that sex is determir.cu incis species? (2 points) >9 78 89 83 % 88 XX * * ** 38 % do

Answer 1

1) a) No. The haploid number of chromosomes is 17, haploid means there is only one set of chromosomes, haploid number of chromosomes can be odd, in humans the haploid number of chromosomes is 23.

Diploid means there are two sets of chromosomes, number of chromosomes in the diploid state of the algal cell is 17*2= 34

haploid cells can undergo mitosis, even if the number of chromosomes is an odd number.

only diploid cells undergo meiosis, and diploid number of chromosomes has to be an even number so that cells can undergo meiosis.here diploid number of chromosomes is an even number.

b) yeast cells can be either haploid or diploid, here some cells have 5 chromosomes and other cells have 10 chromosomes, the cells with 5 chromosomes are haploid and the cells with 10 chromosomes are diploid.

diploid cells are formed by the mating of two haploid cells.