(Originais Teachy 2023) - Question Very Easy of Biology

In a genetics experiment, a Biology teacher challenged his 3rd-year high school students to analyze a pea plant that exhibits two characteristics: seed color and seed texture. Seed color can be yellow (AA or Aa) or green (aa), and seed texture can be smooth (TT or Tt) or wrinkled (tt). These characteristics are determined by genes on different chromosomes, so they segregate independently, following Mendel's 2nd Law. The teacher challenges the students to determine the expected phenotypic and genotypic ratios in the F2 (second generation) of a cross between two plants that are heterozygous for both characteristics. Additionally, he asks the students to relate the concept of independent assortment to Mendelian inheritance principles. Based on this information: 1. Calculate the expected phenotypic and genotypic ratios in the F2 of the proposed cross. 2. Explain how the independent segregation of alleles for each characteristic relates to Mendel's 2nd Law and how this principle influences the determination of ratios in the F2.

During puberty, significant changes occur in the human body due to the activation of the reproductive system. This process is controlled by hormones, which act on the sexual organs and also on other body systems. Explain how the pituitary gland and the hypothalamus, both located in the brain, interact to control puberty. In addition, discuss the role of follicle-stimulating hormone (FSH), luteinizing hormone (LH), and human chorionic gonadotropin (hCG) in the development and maintenance of reproductive structures, and how these hormones can be targets for regulation in infertility treatments. Finally, mention and briefly explain a medical condition that may arise due to alterations in the functioning of the reproductive system during puberty.

Biocycles are large sets of ecosystems that share specific characteristics related to the nature of the environment in which they live and the life forms that inhabit it. Considering the three biocycles: epinocycle, talassocycle, and limnocycle, which one refers to the set of terrestrial ecosystems?