Answer:
75% brown, 25% white
Explanation:
This question involves a single gene coding for color in chickens. The allele for brown color (B) is dominant over the allele for white color (b).
According to this question, a brown rooter with genotype 'BB' was crossed with a white hen (bb). The offsprings in the F1 generation will all possess the 'Bb' genotype and be brown colored. However, if these F1 offsprings are self-mated i.e Bb × Bb, the proportion of F2 offsprings will be 1BB, 2Bb, 1bb.
Since BB, Bb and Bb offsprings are Brown in color and bb is white in color, this means that the expected phenotypic appearance of the F2 offsprings will be:
¾ or 75% brown and ¼ or 25% white
Answer:
Box 1: AA
Box 2: Aa
Box 3: AA
Explanation:
In order to figure out the pedigree, you first have to do a punnet square- kind of like cross-multiplying. EX: For the first box: Aa x AA
For box one, we know that it is Aa, and not AA, because box 2 has to be AA.
We know that because Aa X Aa would give us some "aa" offspring which we do not see in the last generation (see 2nd pic). The only way to get no "aa" offspring is to have an AA X Aa cross.
<u>Answer:</u>
The<u> Lead </u>toxicity can result in slow growth and iron-deficiency anemia, and can damage the brain and central nervous system.
<u>Explanation:</u>
Lead poisoning is a form of metal poisoning in the body which is triggered by lead. The most prone of these is the brain. Signs can be abdominal pain, indigestion, fatigue, irritability, problems with memory, failure to have children and numbness in the hands and feet.
It triggers nearly 10 per cent of quite unknown cause's intellectual disability and can lead to behavioral problems. A few of the consequences are irreversible. In extreme cases there may be coma, anemia, seizures or death.
You be the battery, I'll be the aluminum foil and together we'll light up the world.
