Question

1. tall sunflowers are dominant to short, while yellow-colored flowers are dominant to orange. cross a plant that is heterozygous for both traits with a plant that is heterozygous for height, but homozygous dominant for flower color. what will be the possible genotypes and phenotypes of the offspring? show your work as a punnett square and write your answers as a phenotypic ratio.8. using the punnett square that you created for problem #7, answer the following questions:a. a sunflower farmer knows that most people prefer tall and yellow-colored flowers. if he grows 1000 sunflowers from these two parents, how many can expect to have the desired traits?

Explanation:

Step1: Define allele symbols

Let $T$ = tall (dominant), $t$ = short (recessive); $Y$ = yellow (dominant), $y$ = orange (recessive)

Step2: Identify parent genotypes

Parent 1 (heterozygous both): $TtYy$; Parent 2 (heterozygous height, homozygous dominant color): $TtYY$

Step3: List gamete combinations

Parent 1 gametes: $TY, Ty, tY, ty$; Parent 2 gametes: $TY, tY$

Step4: Complete Punnett square

	$TY$	$Ty$	$tY$	$ty$
$tY$	$TtYY$	$TtYy$	$ttYY$	$ttYy$

Step5: Classify phenotypes

• Tall, yellow: $TTYY, TTYy, TtYY, TtYy, TtYY, TtYy$ (6 out of 8)
• Short, yellow: $ttYY, ttYy$ (2 out of 8)

Step6: Simplify phenotypic ratio

$\frac{6}{8}:\frac{2}{8} = 3:1$

Step7: Calculate desired sunflowers

Tall yellow proportion = $\frac{3}{4}$; $1000 \times \frac{3}{4} = 750$

Answer:

Problem 7:

Phenotypic ratio: 3 Tall, Yellow : 1 Short, Yellow

Problem 8a:

750