Sexual selection example; The brightness of the feathers of a peacock. You may also see similar traits in other birds, where some dance and show off bright feathers to attract a mate, where other build nests. These specific traits do not increase their chance of survival, and are not learned. They increase their fitness because they increase their chances of reproduction and passing on their genes.
Survival of the fittest = Survival of those who survive, and reproduce
Answer:
The correct answer is option D) Albino = recessive, black = dominant.
Explanation:
- According to Mendel's Law of Dominance, of the two alleles which represent a gene, one can express itself even when in the presence of the other allele, that is in heterozygous state. This is called the Dominant allele. The other allele can express itself only in homozygous state. This is called the Recessive Allele.
- When a black guinea pig is crossed with an albino guinea pig, all black offspring (5) are obtained in the F1 generation.
- This indicates that the Black colour is dominant over the albino colour, as it masks the expressions of the albino phenotype.
- This also indicates that the genotype of the parent black guinea pig is homozygous dominant, as if it would have been heterozygous dominant then in the F1 generation there was a chance of formation of both black and albino offspring in 1 : 1 ratio.
- When a black guinea pig from the F1 generation is crossed with the albino guinea pig it gives both black (4) and albino (3) guinea pigs, roughly in the 1 : 1 ratio.
- This indicates that black guinea pig from the F1 generation was heterozygous dominant. This is why the recessive allele giving rise to the albino phenotype could express itself in the second cross.
- The second cross between F1 offspring and recessive parent is called the Test Cross.
Answer:
The earth is made up of three different layers: the crust, the mantle and the core. This is the outside layer of the earth and is made of solid rock, mostly basalt and granite. Continental crust is less dense, thicker, and mainly composed of granite.
Explanation:
Fog occurs in inlets and bays when the water temperature is warm enough for water vapor to evaporate off of these water bodies and the external temperature is cool enough close to the bodies of water for condensation to occur. The water vapor from the water bodies contain nuclei by which the clouds can form and if the air is cool enough this will occur over the water body relatively quickly. This may occur more in the early mornings or late afternoons.
The planets moons movements and the attraction that can be caused between it
Example : Pluto gains a fourth moon Or a massive new planet in our solar system
