College

Select the correct answer from each drop-down menu.

If a heterozygous male with the genotype [tex]Ww[/tex] is mated with a homozygous recessive female of genotype [tex]ww[/tex], there is a chance that:

[tex]
\[
\begin{array}{|c|c|c|}
\hline \multicolumn{3}{|c|}{\text{of the offspring will be heterozygous.}} \\
\hline & W & w \\
\hline W & Ww & ww \\
\hline w & Ww & ww \\
\hline
\end{array}
\]
[/tex]

If the heterozygous [tex]Ww[/tex] is crossed with a homozygous dominant [tex]WW[/tex], then the probability of having a homozygous recessive offspring is:

[tex]
\[
\square
\]
[/tex]

[tex]
\[
\begin{array}{|c|c|c|}
\hline & W & w \\
\hline W & WW & Ww \\
\hline W & WW & Ww \\
\hline
\end{array}
\]
[/tex]

Answer :

To solve these genetics problems, we need to use Mendelian genetics and Punnett squares. We'll break down each part of the question:

### Part 1: Heterozygous Male Ww x Homozygous Recessive Female ww

1. Parent Genotypes:
- Heterozygous Male: Ww
- Homozygous Recessive Female: ww

2. Construct the Punnett Square:
- Create a grid where one parent's alleles (W and w from Ww) are on the top and the other parent's alleles (both w from ww) are on the side.

```
| W | w |
-------------
w | Ww | ww |
-------------
w | Ww | ww |
```

3. Offspring Genotype Possibilities:
- Ww
- ww
- Ww
- ww

4. Probability of Heterozygous Offspring (Ww):
- Out of the 4 possible outcomes, 2 of them are Ww.
- So, the probability is 2 out of 4, which simplifies to 0.5 or 50%.

### Part 2: Heterozygous Ww x Homozygous Dominant WW

1. Parent Genotypes:
- Heterozygous: Ww
- Homozygous Dominant: WW

2. Construct the Punnett Square:
- Place one parent's alleles on the top (W and w from Ww) and the other parent's alleles on the side (both W from WW).

```
| W | w |
-------------
W | WW | Ww |
-------------
W | WW | Ww |
```

3. Offspring Genotype Possibilities:
- WW
- Ww
- WW
- Ww

4. Probability of Homozygous Recessive Offspring (ww):
- There are no ww genotypes possible from this pair.
- Therefore, the probability is 0 out of 4, or 0%.

So in summary:
- The chance that the offspring will be heterozygous is 50%.
- The probability of having a homozygous recessive offspring is 0%.

Other Questions