Answer:
C. Fi 1:0, F2 3:1
Explanation:
Firstly, Mendel's law of segregation states that the alleles of a gene will randomly separate into gametes during gamete formation. In this case involving a single trait, hence, a single gene. Mendel crossed two purebreeding plants i.e. homozygous plants that produced different phenotypes for the same gene. He obtained his offsprings which he called F1 offsprings. He realized that all the F1 offsprings expressed only one phenotype. For example, when he crossed homozygous tall (TT) and short (tt) plants, he got F1 offsprings that were all tall.
He then self-crossed these F1 offsprings to produce a F2 offsprings that had a phenotypic ratio of 3:1 i.e. 3tall, 1short plant. He concluded that the alleles of the single gene had segregated into the gametes but one allele was capable of masking the expression of another, as seen in the heterozygous F1 offsprings that were all tall (Tt).
Hence, he obtained a 1:O ratio for his F1 offsprings then a 3:1 ratio for his F2 offsprings.
Explanation:
Renewable and Nonrenewable resources are types of natural resources.
Renewable resources are those resources that can be replaced and renewed naturally such as air, wind whereas nonrenewable resources are those resources that cannot be replaced naturally such as coal, natural gas.
- Human behavior has affected the natural resources and its quality.
- burning of fossil fuels by the human has affected the natural resources by releasing chemicals and toxic substances in the environment.
- Deforestation, land construction and mining activities have disturbed the ecosystem and natural resources.
- A large number of factories and vehicle used by the human has affected the natural resources as it affects the natural quality and increase in the demand for fossil fuels has resulted in depletion of the limited resources.
The modern taxonomists classified organisms on the general basis of evolutionary, morphological, and genetic traits
Explanation:
- Evolutionary relationships provides the phylogeny of evolutionary ancestors and descendants
- Homologous structures are structures which look the same but perform different functions
, like bones of a human leg compared to bones on a bird's wing
- Analogous structures have different structure but same function like an insect’s and a bird’s wing
- Embryo developmental pattern and similar relationships
- Similarities in DNA and protein sequencing in related organisms
The above basis provided modern taxonomists to classify organisms according to the various disciplines like Genetics, Cytology, Embryology, Physiology, Anatomy and many more.
The answer is “A”
It is a polar and covalent compound.
<span>There would be 24 and 23 since after meiosis II there would be two gametes that would have 2n+1 chromosomes and two gametes that have n chromosomes.</span>
