Biology, 26.11.2019 01:31 Apple557

Choose true or false for the following statements.
1. alleles of every gene in a population make up the population’s gene pool.
2. a population in genetics always includes all members of a particular species.
3. once a population is established, its genetic composition does not change over time.
4. population genetics looks at changes in genetic variation that occur over time.

Answers: 2

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Answer from: tatertott8592

Answer No 1: True

Gene pool can be described as the number of genes which are present in a population of organisms which can interbreed. All the genetic information that is present in a population is the gene pool. As genes are made up of alleles, all the alleles which are present in a population will make up the gene pool.

Answer No 2: False

In genetics, a population can be described as the members of a species which can interbreed and produce fertile offsprings that are living in a certain area during a certain time period.

The option 2 is false because it does not specify area and time period in the definition.

Answer No 3: False

Over time, the genetic composition of a population will change. The organisms which will better adapted to survive to the environmental changes will survive and reproduce. The organisms which are not properly adapted might not be able to survive at all or they might become lesser in number. Hence, the genetic composition keeps changing depending on environmental changes.

Answer No 4: True

Population genetics can be described as a study of the genetic variations which occur in a certain population. It evaluates the gene frequency and how the gene frequency changes for a certain gene changes over time in a population.

Population genetics helps us to recognize the alleles which are better suited for an environment and which are present in a certain environment in abundance.

Answer from: Quest

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.

Answer from: Quest

Proteins are the workhorses of the cell, controlling virtually every reaction within as well as providing structure and serving as signals to other cells. proteins are long chains of amino acids , and the exact sequence of the amino acids determines the final structure and function of the protein. instructions for that sequence are encoded in genes . to make a particular protein, a messenger ribonucleic acid (mrna) copy is made from the gene (in the process called transcription ), and the mrna is transported to the ribosome . protein synthesis, also called translation , begins when the two ribosomal subunits link onto the mrna. this step, called initiation, is followed by elongation, in which successive amino acids are added to the growing chain, brought in by transfer rnas (trnas). in this step, the ribosome reads the nucleotides of mrna three by three, in units called codons , and matches each to three nucleotides on the trna, called the anticodon. finally, during termination, the ribosome unbinds from the mrna, and the amino acid chain goes on to be processed and folded to make the final, functional protein

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