Answer:
9/32 Pink, Tall and Normal individuals Rr Tt Nn
Explanation:
<u>Available data:</u>
- Red color RR
- Pink color Rr
- White color rr
- Normal NN and Nn
- Symmetrical nn
- Tall TT and Tt
- Dwarf tt
1st Cross:
Parental) rr TT NN x RR tt nn
F1) 100% RrTtNn
2nd Cross:
Parental) Rr Tt Nn x Rr Tt Nn
Knowing that these three genes assort independently, then we can infer that the F2 will have the next phenotypic proportions for each gene:
RR= 1/4 Red
Rr= 2/4 Pink
rr=1/4 White
TT + Tt= 3/4 Tall
tt=1/4 Dwarf
NN + Nn = 3/4 Normal
nn=1/4 Symmetrical
- The proportion of the F2 plants that will resemble Rr Tt Nn (Pink, tall, Normal) in Phenotype
Rr= 2/4 pink
TT + Tt= 3/4 Tall
NN + Nn = 3/4 Normal
2/4 x 3/4 x 3/4 = 18/64= 9/32
Answer:
The correct answer is (b): Individuals with certain advantageous traits are selected, in the sense that they produce the most offspring.
Explanation:
Natural selection can cause a change in allele frequencies over time, making the best alleles, those better adapted, more common in the population over generations.
This is called Fitness, and it refers to how many offspring organisms of a particular genotype or phenotype leave in the next generation, relative to others in the group.
Natural selection can act on different alleles of a single gene, or on polygenic traits.
Natural selection can shift phenotype distributions in three ways:
-Stabilizing selection: Intermediate phenotypes are more fit than
extreme ones, e.g. camouflage.
-Directional selection: One extreme phenotype is more fit than all the
others, e.g. are more hidden in shadow and survive better than other
types.
-Disruptive selection: Both extreme phenotypes are more fit than those
in the middle, e.g. mimesis on octopuses.
I hope it helps!
Answer:
c
Explanation:
Natrual selection is survival of the fittest, so only the best suited for that environment survive.
Flat layered clouds with horizontal development are called STRATUS or STRATI-FORM clouds. These clouds have a layered or spread out aspect. They form when air is forced upwards by forced convection. Forced convection can occur as a result of surface convergence or movement of a frontal boundary. Examples of stratus clouds are cirro-stratus and alto-stratus clouds.
<span>"Huffing paint can damage your lungs, kidneys, and liver."
</span><span>Inhaled toxins become systemic and cause damage to major organs such as the lungs, liver, and kidneys. Inhalants tend to produce euphoria, not just a mild state of intoxication. Huffing paint will not produce major withdrawal symptoms. All toxic substances that are inhaled become systemic and cause damage to major organs such as the lungs, liver, and kidneys.</span>