When an organism has two dominant alleles for a gene, the dominant allele will be shown. When an organism has one dominant and one recessive allele, the dominant allele will be shown. When an organism has two recessive alleles for a gene, the recessive allele will be shown.
But why? Why do you want to know who I am?
Natural selection only acts directly on phenotype, not genotype. It acts directly on an organisms characteristics, not its alleles. Natural selection never acts directly on genes.
Answer:
b. Menopause
The end or cessation of menstruation is called menopause.
Explanation:
Menopause is the event when menses stop. Climacteric is more adequate to refer to the diseases associated with the decrease of ovarian function that will lead later to the event when menstruation cease, commonly known as menopause.
On the other hand, amenorrhea is the absence of some menstruation periods but during the reproductive period of a woman, and menarche is called to the event when the first menstrual cycle occurs.
Sheets
Explanation:
Silicon - oxygen tetrahedra in clay minerals are arranged in form of sheets. In clay minerals the silica tetrahedra is classified as a sheet silicate.
- The layers are arranged on top of one another like leaves of books.
- There are different arrangement of silicate structures in different minerals.
- In some minerals like quartz, they are interlocked forming a framework pattern.
- Examples of clay minerals are phlogopite, montmorilloinite, e.t.c
Learn more:
Silicate minerals brainly.com/question/4772323
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