1. Stella Blue is a biologist working at Yellow Island Aquaculture in Campbell R
ID: 145638 • Letter: 1
Question
1. Stella Blue is a biologist working at Yellow Island Aquaculture in Campbell River, British Columbia, and is counting the number of chromosomes in a sample of Chinook salmon milt (sperm) harvested from a 7 pound hooknose male. She counts 34 visible chromosomes in each of 100 spermatozoa. Based on this number, what is the total number of chromosomes in a diploid (2n) Chinook salmon?
2. A diploid male germ cell has a total of 8 chromosomes.
a) How many telomeres are present in Metaphase I?
b) Among all daughter cells, how many chromosomes are present in Metaphase II?
c) Among all daughter cells, how many chromosomes are present in Anaphase II?
3. Prior to DNA replication, a diploid wing cell of the female yellow fever mosquito (Aedes aegypti) has 12 telomeres. Given this information, what is the total number of chromosomes in each haploid egg cell she produces?
***CHALLENGE QUESTION***
4. Jack Straw from Wichita is working the late shift at In-N-Out. Instead of cutting potatoes, he whips out a light microscope he’s borrowed from the CSUF Biology Department and counts chromosomes from one of the spuds he’s supposed to be peeling. After a few tries, he steadily counts 48 total chromosomes per cell. He recalls that his highly influential BIOL273 professor once told him that domesticated potatoes are tetraploid with chromosomes that occur in a variety of different sizes.
What do you think the number of novel chromosome sizes (e.g., different size classes) is in Jack's potato? HINT: What is the haploid number (n = ?)?
Explanation / Answer
Please find the answers below:
Answer 1: According to the information, the supermarkets contains 7 chromosomes. A alternation is a completely mature tabloid male gamete. Thus, the somatic cells will contain 7*2= 14 chromosomes in total.Thus, the 2n number is 14.
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