The cross AB/ab X ab/ab produces the following progeny: AB/ab 391, ab/ab 401, aB/ab 406, Ab/ab 386. From these data, one can conclude that the A and B loci assort independently.
A. True
B. False
Solved
Show answers
More tips
- F Food and Cooking How to Make Cottage Cheese at Home: Simple and Quick Recipe with Step By Step Instructions...
- O Other What is a Disk Emulsifier and How Does it Work?...
- F Family and Home What does a newborn need?...
- F Family and Home Choosing the Right Car Seat for Your Child: Tips and Recommendations...
- F Food and Cooking How to Get Reconfirmation of Registration?...
- C Computers and Internet How to Get Rid of Spam in ICQ?...
- A Art and Culture Who Said The Less We Love a Woman, the More She Likes Us ?...
- F Family and Home How to Get Rid of Your Neighbors?...
- S Society and Politics How Could Nobody Know About the Dead Mountaineers?...
- H Health and Medicine How to Cure Adenoids?...
Answers on questions: Biology
- B Biology TRUE OR FALSE: A high viscosity of blood causes an increased resistance in the blood vessels and leads to a slower blood flow....
- B Biology Selection that acts, over evolutionary time, to enhance traits that increase an individual s ability to mate frequently or with quality partners is known as ....
- B Biology What are the functions of a cyclin during the cell cycle ? 1. Activate a CDK 2. Direct a CDK to its targets. 3. Inhibit a CDK. 4. Control CDK activity through phosphorylation...
- B Biology G If I see a decreased response after administration of repeated doses of a drug I might suspect that the cell has a) Up regulated a receptor b) Blocked receptor action c)...
- B Biology Compare and contrast the characteristic of fibrous and globular proteins. Consider their biological functions, water solubility, amino acid composition, secondary structure,...
- B Biology What generally happens at any front? a. An air mass rises. b. The temperature falls. C. A high-pressure zone forms. d. two of the above...
- B Biology Choose the best, or most specific, term to complete each sentence. A (an) is a segment of a gene that does not code for a product. A (an) is a DNA sequence that begins with...
- B Biology Plants and lichens are important in both physically and chemically rocks. a) building b) depositing c) eroding eliminate d) weathering...
- B Biology Type of cell that does not have a well definied nuclei...
- B Biology What major contribution did james hutton and sir charles lyell make to the field of geology a discovery of fossils in the la brea tar pits b a new form of radiometric dating...
Ответ:
B
Explanation:
The two loci did not assort independently.
In order to check for independent assortment or otherwise of the result from the cross, Chi-square is used to see if the result conforms with that of Mendelian standard of 9:3:3:1.
Phenotype Observed f Expected f
= ![\frac{(O - E)^2}{E}](/tpl/images/0714/5472/bca2c.png)
AB/ab 391 9/16 x 1584 = 891
= 280.58
ab/ab 401 3/16 x 1584 = 297
= 36.42
aB/ab 406 3/16 x 1584 = 297
= 40.00
Ab/ab 386 1/16 x 1584 = 99
= 832.01
Total
= 280.58 + 36.42 + 40.00 + 832.01 = 1,189.01
Degree of freedom = 4 - 1 = 3
Tabulated
at degree 3 freedom and 95% level = 7.815
The calculated
value is more than the tabulated value. Therefore, we conclude that the outcome of the cross is not in agreement with Mendelian standard and hence, the A and B loci did not assort independently.
The correct option is B.
Ответ:
The answer is; concentration of oxygen and/or total atmospheric pressure is lower at high altitudes
This means that at high altitude, due to the low pressure, every breath has a lower oxygen content than at a lower altitude. This, therefore, necessitates the body to increase the erythrocyte numbers in the blood to maximize the uptake of oxygen from the thinner air.