The olfactory cortex (nucus) of the temporal lobe is where the nerve fibers of the olfactory bulb projects directly. This cortex is where you get the smell sensation before determining what the smell actually is. The olfactory cortex is located on the medial aspect of the temporal lobe, particularly in the uncus or the piriform lobe. It is also called the Rhinoencephalon or the nose brain.

6 0

3 years ago

Two independently segregating genes determine kernel color in wheat. Red color results from at least one dominant allele in both

Lera25 [3.4K]

Answer:

a) The expected phenotype of the F1 plants is 100% RrBb, red kernels.

b) The expected phenotypic classes in the F2 are: 9:3:3:1

9/16 R-B-, 3/16 rrB-, 3/16 R-bb, 1/16 rrbb

Proportions 9:6:1.

9/16 Red kernel (R-B-), 6/16 Brown kernel (rrB- + R-bb), 1/16 White kernel (rrbb)

Explanation:

Available data:

red kernel: R-B-

brown kernel: R-bb or rrB-

white kernel: rrbb

1º Cross) RRBB x rrbb

F1) 100% RrBb (red kernels)

2ºCross) RrBb x RrBb

Gametes) RB RB

Rb Rb

rB rB

rb rb

Punnet Square) RB Rb rB rb

RB RRBB RRBb RrBB RrBb

Rb RRBb RRbb RrBB Rrbb

rB RrBB RrBb rrBB rrBb

rb RrBb Rrbb rrBb rrbb

F2) Phenotypic classes:

9/16 R-B-

 3/16 rrB-

 3/16 R-bb

 1/16 rrbb

Phenotypic proportions:

9/16 Red kernel (R-B-)

6/16 Brown kernel (rrB- + R-bb)

1/16 White kernel (rrbb)

7 0

3 years ago