in roses, red flowers and long stems are dominant traits. a rose plant that is homozygous for both red…

in roses, red flowers and long stems are dominant traits. a rose plant that is homozygous for both red flowers and long stems is crossed with a rose plant that is heterozygous for red flowers and homozygous for short stems. what percentage of the offspring will exhibit red, long - stemmed flowers?\no 25 percent\no 50 percent\no 75 percent\no 100 percent

in roses, red flowers and long stems are dominant traits. a rose plant that is homozygous for both red flowers and long stems is crossed with a rose plant that is heterozygous for red flowers and homozygous for short stems. what percentage of the offspring will exhibit red, long - stemmed flowers?\no 25 percent\no 50 percent\no 75 percent\no 100 percent

Answer

Explanation:

Step1: Define alleles

Let R represent the allele for red flowers (dominant) and r for white flowers (recessive). Let L represent the allele for long - stems (dominant) and l for short - stems (recessive).

Step2: Determine parental genotypes

The homozygous red - flowered, long - stemmed plant has genotype RRLL. The heterozygous red - flowered, homozygous short - stemmed plant has genotype Rrll.

Step3: Determine gametes

The RRLL plant can only produce RL gametes. The Rrll plant can produce Rl and rl gametes.

Step4: Set up Punnett - square or use probability rules

Using the product rule of probability for independent events. For flower color, when RR is crossed with Rr, all offspring will have red flowers (probability = 1). For stem length, when LL is crossed with ll, all offspring will have long stems (probability = 1). The probability of having red, long - stemmed flowers is the product of the probabilities of having red flowers and long stems, which is 1×1 = 1 or 100%.

Answer:

100 percent