College

Dear beloved readers, welcome to our website! We hope your visit here brings you valuable insights and meaningful inspiration. Thank you for taking the time to stop by and explore the content we've prepared for you.
------------------------------------------------ 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]
\[
\begin{array}{|c|c|c|}
\hline
\multicolumn{3}{|c|}{\text{\checkmark of the offspring will be heterozygous.}} \\
\hline
& W & w \\
\hline
w & Ww & ww \\
\hline
w & Ww & ww \\
\hline
\end{array}
\]
[/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]
\[
\begin{array}{|c|c|c|}
\hline
& W & \\
\hline
W & WW & Ww \\
\hline
W & WW & Ww \\
\hline
\end{array}
\]
[/tex]

Answer :

Let's break down the genetics question step-by-step:

1. First Scenario: Heterozygous Male (Ww) x Homozygous Recessive Female (ww)
- We're dealing with two genotypes: Ww and ww.
- When you create a Punnett square, you place the alleles of one parent along the top (W and w) and alleles of the other parent along the side (w and w).
- By filling in the square, you get the potential genetic combinations of the offspring:
- Top row: Ww and ww
- Bottom row: Ww and ww
- So, there are 4 possible outcomes: Ww, ww, Ww, ww.
- The question asks for the probability that offspring will be heterozygous (Ww).
- In this case, 2 out of the 4 possible offspring are Ww.
- Therefore, the chance of offspring being heterozygous is 2/4, which simplifies to 0.5 or 50%.

2. Second Scenario: Heterozygous (Ww) x Homozygous Dominant (WW)
- Here, the genotypes are Ww and WW.
- In the Punnett square, you place W and w along one side and W and W along the other.
- Fill out the square to find these combinations:
- Top row: WW and WW
- Bottom row: Ww and Ww
- Again, you have 4 possible outcomes: WW, WW, Ww, Ww.
- This time, the question asks about the probability of having homozygous recessive offspring. A homozygous recessive genotype is ww.
- None of the offspring in this scenario are ww.
- Thus, the probability of having a homozygous recessive offspring is 0/4, which is 0.0 or 0%.

In summary, there's a 50% chance the offspring will be heterozygous (Ww) in the first case and a 0% chance of having a homozygous recessive (ww) offspring in the second case.