You are running a nursery for garden peas at baton rouge, and you have two pure-bred garden pea strains: yellow wrinkled [yyrr] and green round [yyrr]. you know that yellow is dominant to green, and also that round is dominant to wrinkled. one customer dropped by and asked about one particular pure-bred strain, yellow round [yyrr]. you promised to that customer that you could generate that strain next year through the following breeding experiments.
i. crossing pure-bred yellow wrinkled with green round
ii. self-crossing f1 progeny
iii. screening pure-bred yellow round among the f2 progeny

what is the genotype for f1 progeny?

a. yyrr
b. rryy
c. yyrr
d. yyrr
e. none of the above

C. YyRr

Explanation:

The cross was done between pure-bred Yellow Wrinkled and Green Round plants. The genotype of the pure breeding yellow wrinkled parent plant: YYrr. The genotype of the pure breeding green round parent plant: yyRR.

A cross between YYrr and yyRR would obtain the progeny in the following ratios:

YYrr x yyRR= All YyRr (yellow and round)

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.