2. A Mendelian trait is caused by a single gene. 3. Traits can be dominant or recessive and recur in a predictable pattern in subsequent generations. ... Autosomal Recessive Inheritance: Autosomal recessive traits can skip generations and can affect both sexes.
<h3><u>Answer</u>;</h3>
Key
A sorting device that is useful in classifying by observation is a <u>key</u>.
<h3><u>Explanation</u>;</h3>
- <em><u>Classification key or taxonomic key is a device that is used by scientists to identify unknown organisms. </u></em>
- They are constructed so that the user gets a series of choices about the characteristics of the unknown organisms.Thus, by making the correct choice at each step, one is led to the identity of the specimen.
- Therefore<u><em>, keys can be used to identify a living organism or determine which group it belongs to</em></u> by answering questions on the key about characteristics of living things.
Usually, volcanic ashes and cooled lava contain different minerals that plants can use. Therefore, usable.