About 25 of the 92 natural elements are essential to life.
Answer:
AB, aB, Ab
Explanation:
Man has blood type B so could be BB (homozygous dominant) or could be Bb (heterozygous)
Woman has blood type A, so she could be AA (heterozygous dominant) or Aa (heterozygous)
Now, we need to make a separate cross for woman with AA, man with BB and we get children of all AB
Then we can make another cross for genotypes Aa and BB, and we get AB and aB
We can continue this for AA,Bb and for Aa,Bb
Answer: Ginkgo
Explanation:
There are 4 types of gymnosperms that produce fleshy fruits around their seeds which are usually considered as cones. These are Ginkgo, conifers, gnetophytes, and cycads. These plants have been evolved for fruit production as gymnosperms are known for their naked ovules and their seeds are stored in rough woody structure that is called as cone. There are separate males and female cones are present in gymnosperms.
Among the options given Ginkgo is the correct option it produces cones that look like berries. This advantageous evolution and helps in transfer of seeds through animals as they consume fruits or berries and disperse seeds in their feces.
Answer:
<em>Bright white fur 3/4</em>
<em>Black fur 3/16</em>
<em>brown fur 1/16</em>
Explanation:
From the Punnet's square analysis (see the attached image);
- <em>A_B_ 9/16 </em>
- <em>A_bb 3/16</em>
- <em>aaB_ 3/16</em>
- <em>aabb 1/16</em>
A_B_ and A_bb will always give offsprings with bright white fur since allele A always mask the effect of B.
aaB_ will always give offsprings with black fur since allele a does not produce any protein.
aabb will give offsprings with brown fur since b codes for brown fur colour.
Hence, the phenotypic ratio of the offspring will be;
<em>Bright white fur 3/4</em>
<em>Black fur 3/16</em>
<em>brown fur 1/16</em>
During the cortical reaction, enzymes are released from vesicles in the oocyte. <span>The cortical reaction is a reaction for preventing polyspermy, the fusion of multiple sperm with one egg. It is a process which occurs during fertilization by the release of cortical granules from the egg. Cortical granules contain components which establish a permanent barrier to sperm entry.</span>
