A biological system or also called, a biotic community is
composed mainly of living organisms. These organisms can be classified into the
main layman categories of animals and plants, majorly. These creatures can be
more furthered classified by how they eat and survive. Plants can make their
own food through, photosynthesis. Animals eat and are dependent. Can be
classified into subtypes as: herbivores, omnivores and carnivores. What makes
all of these organisms a biotic community or a biological system is they
contain cells, cells are the basic unit and foundation of every living thing.
RNA a long, collection of genes that carries heredity information and is formed from condensed chromatin.
Answer:
Parental cross: Bb x Bb
F1:
- Expected phenotypic ratio: 3/4 black fur (B_); 1/4 white fur (bb) >> 3:1
- Expected genotypic ratio: 1/4 BB; 1/2 Bb; 1/4 bb >> 1:2:1
Explanation:
A gene variant or 'allele' is dominant when it completely masks the presence of the other allele called recessive in individuals that are heterozygous for that gene. In this case, the allele 'B' associated with the black fur phenotype exhibits complete dominance on the allele 'b' associated with the white fur phenotype. In consequence, the mating between two heterozygous (Bb) parents will produce an F1 generation with an expected phenotypic ratio for the fur trait of 3:1, i.e., 3 black fur individuals (B_ genotype) and 1 white fur individual (bb genotype), and an expected genotypic ratio of 1:2:1 among BB, Bb and bb genotypes.
I believe your question is asking what keyboard layout is most commonly used. If that’s the case, then the answer would be the QWERTY keyboard layout.