In a particular flower, being tall (T) is the dominant gene while being short (t) is the recessive gene. The height gene is linked to the color gene. Being purple (P) is the dominant gene and being pink (p) is the recessive gene.

Question

A homozygous dominant tall (TT) and homozygous recessive pink (pp) flower is crossed with a homozygous recessive short (tt) and homozygous dominant purple (PP) flower. What are the chances that their offspring will be short and pink?

(1 point)
Responses

12.5%
12.5%

100%
100%

25%
25%

0%

Answer 1

To determine the chances that the offspring will be short (tt) and pink (pp) when crossing the specified flower genotypes, we need to analyze the parental genotypes and their possible offspring.

The parental crosses specified are:

1. Parent 1: TTpp (homozygous dominant tall and homozygous recessive pink)
2. Parent 2: ttPP (homozygous recessive short and homozygous dominant purple)

Step 1: Determine the gametes of each parent

• Parent 1 (TTpp) can produce the following gametes:
  • TP (dominant for height and recessive for color)
  • Tp
• Parent 2 (ttPP) can produce the following gametes:
  • tP (recessive for height and dominant for color)
  • tp

Step 2: Set up the Punnett square

Now we can set up a Punnett square to see the combinations:

| | tP | tp | |---------|------|------| | TP | TtPp | Ttpp | | Tp | TtPp | Ttpp |

Step 3: Analyze the offspring genotypes

From the Punnett square, we get the following genotype combinations:

1. TtPp: Tall and purple
2. Ttpp: Tall and pink

Step 4: Determine if any offspring are short and pink (ttpp)

All combinations produced from this cross do not include the short (tt) type because:

• The genotype Tt means they are tall.
• There are no tt combinations present.

Conclusion

Since none of the offspring can be short (tt) and pink (pp), the chances of their offspring being short and pink are 0%.

The correct answer is 0%.