High School

Select the correct answer from each drop-down menu.

1. 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]\(\square\)[/tex] of the offspring will be heterozygous.

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

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

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

- 25%
- 50%
- 100%

Select "Reset" to clear your answers, or "Next" to proceed.

Answer :

To solve this question, we'll look at two genetic crosses. Let's break it down step-by-step:

### First Genetic Cross:
A heterozygous male (Ww) is crossed with a homozygous recessive female (ww).

1. Genotypes of parents: Ww (male), ww (female)
2. Possible offspring genotypes:
- Each parent contributes one allele to the offspring.
- Male (Ww) can contribute either W or w.
- Female (ww) can only contribute w.

This results in the following possible combinations:
- W from male and w from female: Ww
- w from male and w from female: ww

Repeating these combinations:
- Ww, ww, Ww, ww

3. Probability of heterozygous offspring (Ww):
- Out of 4 possible combinations (Ww, ww, Ww, ww), 2 are Ww.
- Therefore, the probability of an offspring being heterozygous is 2 out of 4, which is 50%.

### Second Genetic Cross:
A heterozygous individual (Ww) is crossed with a homozygous dominant individual (WW).

1. Genotypes of parents: Ww and WW
2. Possible offspring genotypes:
- Ww can contribute either W or w.
- WW can only contribute W.

This results in the following combinations:
- W from Ww and W from WW: WW
- w from Ww and W from WW: Ww

Repeating these combinations:
- WW, Ww, WW, Ww

3. Probability of having a homozygous dominant offspring (WW):
- Out of 4 possible combinations (WW, Ww, WW, Ww), 2 are WW.
- Therefore, the probability of an offspring being homozygous dominant is 2 out of 4, which is 50%.

In conclusion:
- In the first cross, there's a 50% chance that the offspring will be heterozygous.
- In the second cross, there's a 50% chance the offspring will be homozygous dominant.