09 Jun A black-coat female mouse was crossed with a black coat male mouse….
Question
A black-coat female mouse was crossed with a black coat male mouse. All the female offspring were black but half of the male offsprings were white. Which of the following statement is NOT true
1. The coated mother was heterozygous for the colour Black
2. The gene for black is located on the X chromosome
3. The daughters of a white mother and white father will be white
4. Black coat is dominant over white
5. The sons of a white coat father will be white
Non-Mendelian F-MCQ1
The gene for colour red in the fruit fly’s eye is located on the X chromosome. A homozygous red eye female was crossed with a white eye male. The F1 generation was crossed. What percentage of white eye female do you expect to see in the F2
1. 100%
2. 75%
3. 25%
4. 0%
Modified dihybrid
The kernel on a cob can either be Purple (dominant colour) or yellow (recessive colour) or pink (intermediate colour ). It is known that the colour purple is the product of a two step reaction with pink being the intermediate product. You counted 1600 kernels on F2 cobs. Answer the following questions below:
1. How many purple kernel would you expect to find?
2. How many pink kernel would you expect to find?
3. How many yellow kernel would you expect to find?
4. What colour would be double homozygous recessive cob be?
5. What colour would the F1 cob be?
Options are: 400, 900, 100, 800, 300, pink, purple, pink and purple, yellow
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