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3 years ago

Explain how Earth's magnetic field is generated.

Biology

2 answers:

pychu [463]3 years ago

8 0

Answer:

On Earth, flowing of liquid metal in the outer core of the planet generates electric currents. The rotation of Earth on its axis causes these electric currents to form a magnetic field which extends around the planet

luda_lava [24]3 years ago

4 0

Answer:

<em>The magnetic field is generated by electric currents due to the motion of convection currents of a mixture of molten iron and nickel in the Earth's outer core: these convection currents are caused by heat escaping from the core, a natural process called a geodynamo.</em>

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8.In a variety of beans the genes for pod texture and seed color are closely linked on the same chromosome. Tough pods (T) are d

lozanna [386]

Answer:

a) Genotypes & Phenotypes in F1 generation

TtRr, Tough and Red seeds

b) Tender pods

Genotypes - ttRR (1), ttRr(2), ttrr (1)

Proportion will be 3/16

c) Red seeds

Genotypes - TTRR, TTRr (2), TtRR (2), TtRr (4)

Proportion will be 9/16

d) Tender pods & red seeds

Proportion will be 3/16

Explanation:

Tough pods (T) are dominant to tender pods (t)

Red seeds (R) are dominant to (r) green seeds

True breeding species

a) Tough pods and red seeds - TTRR

b) Tender pods and green seeds - ttrr

F1 generation -

TTRR * ttrr

TtRr

All the offspring will have TtRr genotype. The Phenotype of all offspring will be tough and red seeds.

F2 generations -

Self crossing the F1 generation species, we get -

TtRr * TtRr

Gametes - TR, Tr, tR , tr

TR Tr tR tr

TR TTRR TTRr TtRR TtRr

Tr TTRr TTrr TtRr Ttrr

tR TtRR TtRr ttRR ttRr

tr TtRr Ttrr ttRr ttrr

a) Genotypes & Phenotypes in F1 generation

TtRr, Tough and Red seeds

b) Tender pods

Genotypes - ttRR (1), ttRr(2), ttrr (1)

Proportion will be 3/16

c) Red seeds

Genotypes - TTRR, TTRr (2), TtRR (2), TtRr (4)

Proportion will be 9/16

d) Tender pods & red seeds

Proportion will be 3/16

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