Ecology is the study of: organic compounds on earth organisms and their environments physical factors affecting the biosphere pollution

Answer:

A dog breeder breeds a brown dog and a black dog and all the puppies are brown.

Explanation:

This is because of the Mendelian inheritance order of characteristics. In all other example, there are several other things that don't align with this order like gender variability, specie variability etc.

All the puppies are brown and this shows proper and complete dominance in accordance with the law...

Answer:

A dog breeder breeds a brown dog and a black dog and all the puppies are brown.

Explanation:

According to Mendel’s Law of Dominance, when two homozygous parents that have contrasting traits are crossed, the dominant trait is what would be expressed in the next generation as phenotype. The offspring produced by these parents are heterozygotes having two different alleles of a trait that are contrasting. One allele will be dominant over the other. The allele that is not expressed is the recessive allele of the trait, while the allele that is expressed is the dominant allele.

A good example of Mendel’s law of Dominance is the case of a dog breeder who breeds a brown dog and a black dog and all the puppies are brown.  

We can infer that both parents are likely homozygous to hair/skin color as a trait. And when crossed, all offspring are brown simply because the allele for brown color is dominant over the allele for black color, and since the offspring are heterozygotes, i.e., they have a pair of dominant allele and recessive allele, the dominant allele would be expressed over the recessive allele. Black color is concealed in the presence of brown color.

The amnion, allantois, yolksac, and chorion are fluid-filled membranes that allow the embryo to survive inside the egg. The amnion, which is filled with amniotic fluid and provides the embryo with a stable fluid environment, surrounds and protects the embryo.

What is an amniotic egg?

A water-retaining shelled egg with four membranes that allows reptiles, birds, and egg-laying mammals to complete their life cycles.

There are membranes present, namely:

• Extra-embryonic membranes: these are the membranes present in amniotic eggs that are not a part of the body of the developingembryo.
• Inner amnioticmembrane: it usually surrounds the embryo.
• The chorion: it surrounds the embryo as well as yolksac and aids in the exchange of gases.
• The amnion: it helps to protect the embryo from mechanical shock as well as supports hydration.
• The allantois: it usually stores nitrogenouswastes generated by the embryo as well as also facilitates respiration.

Thus, these are some membrane that is integral part of the amniotic egg.

For more details regarding amniotic eggs, visit:

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