Question

One trait a plant can have is either red leaves (R) or brown leaves (r). Another trait is tall stems (T) or short stems (t). A plant used in a dihybrid cross has the genotype RRTt. What is the phenotype of this plant ?.
A. Brown leaves , tall stems
B. Red leaves , tall stems
C. Red leaves , short stems
D. Brown leaves , short stems

Answer 1

Answer: Option B. Red leaves, tall stems.

Explanation:

• For a given gene there are two or more alternative forms present called as alleles.
• The alleles of a given gene can either be dominant or recessive.
• A dominant gene is the one which governs the phenotype in both homozygous and heterozygous condition whereas the recessive gene only gets expressed in homozygous condition.
• In the given question the allele R (red leaves) and T (tall stem) is dominant and, therefore, RRTt genotype will have red leaves and tall stem.

Answer 2

Answer:

Red leaves, tall stems

Explanation:

on apex