Question

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.  

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

25%
25%

12.5%
12.5%

100%
100%

0%

Answer 1

To determine the chances that the offspring will be short (tt) and pink (pp), we first need to analyze the genetic makeup of the parents involved in the cross.

1. Parents:
- Parent 1: Homozygous dominant tall (TT) and homozygous recessive pink (pp) = TTPP (tall, purple)
- Parent 2: Homozygous recessive short (tt) and homozygous dominant purple (PP) = ttPP (short, purple)

However, given the breeding pairs from the description:
- Let's assume that Parent 1 is TTpp (tall, pink)
- Parent 2 is ttPP (short, purple)

2. Gametes produced by each parent:
- Parent 1 (TTPP): Produces gametes: TP
- Parent 2 (ttPP): Produces gametes: tP (as it is homozygous for purple, its other trait is recessive tallness)

3. Possible offspring combinations from the gametes:
- TP (from Parent 1) with tP (from Parent 2) results in:
- TtPp (tall, purple)

4. To find out the chances for being short (tt) and pink (pp):
- The offspring only has genes from the parents, and no tt or pp alleles could be produced by the parents as described.

Thus, there is no combination of alleles that can yield a "short and pink" phenotype (ttpp) as both recessive traits cannot come from a genetic background that would produce these genes in the described crossing.

Therefore, the chances that their offspring will be short (tt) and pink (pp) is:

**0%**