The punnett square obtained by the dihybrid cross between two pea plants is shown in the table. both plants have genotype rryy. based on the above data, a student has concluded that the phenotypic ratio of dihybrid crosses is 9: 3: 3: 1. what comment would you make about the student's conclusion?
a) she is correct. the ratio should be 9: 3: 3: 1
b) she is incorrect. the ratio should be 9: 4: 2: 1
c) she is incorrect. the ratio should be 4: 4: 4: 4
d) she is incorrect. the ratio should be 9: 5: 1: 1

d

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-ms215

the national environmental policy act (nepa) is a united states environmental law that promotes the enhancement of the environment and established the president's council on environmental quality (ceq). the law was enacted on january 1, 1970. to date, more than 100 nations around the world have enacted national environmental policies modeled after nepa.

a

explanation:

many plants naturally reproduce this way, but it can also be induced artificially. horticulturalists have developed asexual propagation techniques that use vegetative plant parts to replicate plants. success rates and difficulty of propagation vary greatly. monocotyledons typically lack a vascular cambium and therefore are harder to propagate.