Answer:
1) RR x rr
2) Shown below
3) 100% Rr with red eyes
4) Punnett square shown (Rr x Rr)
5) 25% of the offspring are h0m0zygous dominant with red eyes (RR), 50% are heterozygous with red eyes (Rr), and 25% are h0m0zygous with brown eyes (rr)
Explanation:
Let's say the allele for red eyes is R and the allele for brown eyes is r.
1. A cross between a h0m0zygous dominant (two copies of the dominant allele, R) and h0m0zygous recessive (two copies of the recessive allele, r) is: RR x rr
2. R R
r <em>Rr Rr</em>
r <em>Rr Rr</em>
<em />
The F1 generation is shown in the Punnett square above.
3. The F1 generation are 100% Rr. They are heterozygous. Since red (R) is dominant, the rats all have red eyes
4. A cross between the F1 generation (Rr x Rr) gives the F2 generation
R r
R <em>RR Rr</em>
r <em>Rr rr</em>
<em />
5. 25% of the offspring are h0m0zygous dominant with red eyes (RR), 50% are heterozygous with red eyes (Rr), and 25% are h0m0zygous with brown eyes (rr)
Answer:
Nose or nasal cavity, oral cavity or mouth, pharynx,larynx, wind pipe i.e both left and right bronchi, bronchioles, alveoli and lungs.
Explanation:
Air which contain oxygen pass through the nasal cavity, it then move to the pharynx or mouth, through the glottis. The air or oxygen then pass through trachea or windpipe and move to the left and right bronchi, it then move to the alveoli which is the site of gas exchange. Oxygen is absorbed into the blood and the carbondioxide is removed from the blood through the lungs.
Answer:
RNA contains the sugar ribose.
Explanation:
An RNA molecule is made of nitrogenous bases (A, U, G, and C), phosphate groups, and the sugar <em>ribose. </em>
Answer: Organisms can be preserved in tar, amber or ice.
Explanation:
Is is tissue inside of the heart.
