A student wants to prove that amphibians appeared on earth before birds. The student should use the fossil findings as evidence to provide the most reliable information about the periods when amphibians and birds appeared on earth. Fossils would throw light on the internal body structures that bear the closest similarity to either the amphibians or the birds. The radiocarbon dating of the fossils will reveal its age. This can be used to figure out the time of divergence of the two types.
The remaining ratio of alleles is about 3:1
<h3>What about alleles?</h3>
- The term "allele" is employed to refer to a gene's alternate form or variants.
- For each autosomal gene, one allele is inherited from each parent, and that we often group the alleles into groups.
- Usually, we ask them as normal, wild-type, aberrant, or mutant alleles.
- For instance, a dominant allele can overcome the characteristics of other recessive alleles;
- These features are what determine an individual's eye and hair color, for instance .
- In this instance, the dominant brown eye alleles outnumber the recessive blue eye alleles.
- Any of two or more genes that may alternately appear at a certain location (locus) on a chromosome is referred to as an allele, also referred to as an allelomorph.
- Alleles may exist in pairs or there could also be many alleles influencing how a certain trait is expressed (phenotype).
- Each gene during a human has two copies (or alleles), one from each parent.
- Alleles significantly contribute to the event of each person's unique traits.
- Alleles are variants of the identical gene with a minor difference in the DNA base sequence.
- An allele may be a gene's variable form.
- Some genes exist during a number of forms, all of which share the identical genetic locus on a chromosome.
- Because each genetic locus in humans has two alleles—one acquired from each parent—they are referred to as diploid creatures.
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Answer: The calcium ion binds to troponin, and this slides the tropomyosin rods away from the binding sites.
Explanation:
Contraction and relaxation of muscle cells brings about movements of the body. The contractile myofilament called sarcomeres are bounded at each end by a dense stripe called the Z - line, to which the myosin fibres are attached, and lying in the middle of the sarcomere are the actin filaments, overlapping with the myosin.
When action potential spreads from the nerve along the sarcolemma (muscle cell membrane), it penetrates deep into the muscle cell through the sarcoplasm (cytoplasm of muscle cell), and releases CALCIUM from the intracellular stores.CALCIUM triggers the binding of myosin to the actin filament next to it forming CROSS BRIDGES.
For this to occur, ACTIN BINDING SITE has to be made available. TROPOMYOSIN is a protein that winds around the chains of the actin filament and covers the myosin-binding sites to prevent actin from binding to myosin. The first step in the process of contraction is for calcium ions to bind to troponin so that tropomyosin can slide away from the binding sites on the actin strands.
Answer:
The answer is Sedimentary Rock
Explanation:
When magma roucks are combined with stable rocks, the mixtire creates a sedimentary rock form.
