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sweet-ann
12 days ago
14

In humans, a cleft chin is dominant and no-cleft is recessive. What will the generations look like? Assume that Mendel’s method

of crossing two true breeding parents with opposite traits is followed. Check all that apply. The P generation, F1 generation, and F2 generation will have all cleft chins. The P generation, F1 generation, and F2 generation will have all no-cleft chins. The P generation and F1 generation will have all cleft chins. The F1 generation will have all cleft chins. The P generation and F2 generation will have all no-cleft chins. The P generation and F2 generation will have cleft chins and no-cleft chins. The P generation, F1 generation, and F2 generation will have cleft chins and no-cleft chins.
Biology
2 answers:
lana [763]12 days ago
8 0

Response:

The P generation alongside the F1 generation will display only cleft chins.

Each member of the F1 generation will also present with cleft chins.

Explanation:

Within humans, a cleft chin is dominant while no cleft chin is recessive. When two true breeding parents are crossed, the P and F1 generation will consist entirely of cleft chins , however, the F2 generation will have 75% of offspring with cleft chins and 25% with no cleft chin.

Assuming 'A' symbolizes the dominant trait (cleft chin) and 'a' indicates the recessive trait (no cleft chin). The crossing is presented below:

Parental                         AA    x     aa

F1 generation          Aa    Aa    Aa    Aa

For the F2 generation, the F1 generation offspring that are heterozygotes, i.e., Aa & Aa will interbreed.

F1 generation             Aa x Aa

F2 generation       AA  Aa  Aa  aa

Even though the offspring in F1 generation are heterozygotes for the trait, phenotypically they will all have cleft chins.

s2008m [569]12 days ago
4 0
The response is:

The entire F1 generation will exhibit cleft chins. 
Both the P generation and F2<span> generation will show a mix of cleft chins and no cleft chins.</span>
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