<em>A.) Traits Skipping One Or More Generations</em>
Answer:
The given statement is True.
Explanation:
Scala media has endolymph as its constituent and endolymph is rich in Potassium ions (K+)
whereas
Scala tympani and scala vestibuli has in its composition Perilymph and Perilymph has sodium ions as their major constituent ions.
Therefore, scala media is Potassium ion rich while scala tympani and vestibuli are sodium ion rich.
<span>D. In a study of the effect of lawn fertilizer on the health of a
backyard pond, biologists grow two colonies of duckweed in a large flask to
represent pond ecosystems. </span>
The scientific design in which has limitations
due to oversimplification is the statement “in a study of the effect of lawn
fertilizer on the health of a backyard pond, biologists grow two colonies of
duckweed in a large flask to represent pond ecosystems”. Oversimplification is
an overview and generalization of a statement to miscomprehension,
misperception or even error. It overlaps the true statement.
Answer:
The results can be explained if the mutation for bag wings is sex-linked, dominant, and lethal in males.
Explanation:
When a trait is differently expressed in males and females, we must suspect that it's sex-linked.
If we consider the mutation for bag wings as sex-linked and dominant (B), and the wild-type allele (B+) is recessive, then the<u> expected offspring</u> resulting from the cross between a bag-winged female XᴮXᴮ⁺ (heterozygous) and a WT male Xᴮ⁺Y would be:
- 1/4 XᴮXᴮ⁺ bag-winged female
- 1/4 Xᴮ⁺Xᴮ⁺ wild-type female
- 1/4 Xᴮ⁺Y wild-type male
- <u><em>1/4 XᴮY bag winged male</em></u>
But the bag-winged male doesn't appear in the progeny, and the observed proportions of the other phenotypes are 1/3 each. This suggests that the mutation is lethal in males, and maybe in homozygosis in females as well.