In fruit flies, straight wings are dominant and curly wings are recessive. What will the generations look like? Assume that Mend
el’s method of crossing two true breeding parents with opposite traits is followed. Check all that apply.
The P generation has all straight wings.
The P generation has straight wings and curly wings.
The F1 generation has all straight wings.
The F1 generation has all curly wings.
The F1 generation has straight wings and curly wings.
The F2 generation has all straight wings.
The F2 generation has straight wings and curly wings.
The P generation has all straight wings.
The P generation has straight wings and curly wings.
The F1 generation has all straight wings.
The F1 generation has all curly wings.
The F1 generation has straight wings and curly wings.
The F2 generation has all straight wings.
The F2 generation has straight wings and curly wings.
2 answers:
Answer:
The correct statements are:
- The P generation has straight wings and curly wings.
- The F1 generation has all straight wings.
- The F2 generation has straight wings and curly wings.
Let us assume W and w be the alleles of the gene responsible for shape of the wings.
W is a dominant allele which leads to the formation of straight wings.
w is a recessive allele which leads to the formation of curly wings when present in homozygous condition.
Now, true breeds of the parents with opposite traits would be WW and ww.
The cross will produce only one type of offspring that is, heterozygous (Ww) dominant. Hence, all the offsprings (F₁ generation) will have straight wings.
Cross-breeding the F₁ generation will result in the formation of three types of genotypes (WW, Ww and ww) in 1:2:1 and two phenotypes (straight wings and curly wings) in 3:1.
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Answer:
-1.9mL/min
Explanation:
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= ( Final volume - initial volume)/time(min).
From the graph provided and attached below, the rate of O₂ production or rate of photosynthesis at light intensity of 8 is about 3.75 mL/min.
The rate of O₂ production is taken as the rate of photosynthesis. It is expected to progressively increase from light intensity 0 as light intensity increases. However, at very high light intensity, the rate slows down as water becomes limiting and the stomata closes in order to conserve water.
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Experiment 2: Respiration in the Dark
Calculate the volume change for respiration in the dark. As you already saw from earlier questions,
oxygen production is fairly constant. You will not need to calculate the individual volume changes.
Just subtract the original volume at 00:00:00 from the final reading at 00:02:00. Record your answer
for use in a later question.
<em>Note: depending on when you started the timer there is a range of possible answers. Pick the answer that is closest to this</em>
What was the volume change for respiration in the dark?
Correct answer:
-1.9 mL/min
