In the study of Gigord and colleagues using Elderflower orchids, the allele frequencies of yellow and purple flowers varied such that when the yellow allele started to become rare, the reproductive success of purple flowers decreased and the reproductive success of yellow-flowered individuals increased in a process known as <u>frequency-dependent selection.</u>
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Frequency-dependent selection is an evolutionary process in which the fitness of a phenotype or genotype is dependent on the frequency of that phenotype or genotype in a particular population.
- Positive frequency-dependent selection raises the fitness of a phenotype or genotype as it becomes more prevalent.
- In the case of negative frequency-dependent selection, the fitness of an increasingly prevalent phenotype or genotype diminishes.
In a broader sense, frequency-dependent selection involves biological interactions that make the fitness of an individual dependent on the frequencies of other genotypes or phenotypes within the population.
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Answer:
electrical signals
Explanation:
As the light hits our eyes, it passes through the lens and goes to the retina where it gets converted to electrical signals. It travels to the optic nerves, then to the brain which will produce an image for you to see.
Karyotype refers to the visual appearance and number of the chromosomes in the cell nuclei of a species or an organism. It is known that there are 46 chromosomes in a usual nucleus of a human that comprises 23 pairs of chromosomes. Of these, one pair is considered as sex chromosomes.
In females, the sex chromosomes are XX, while in males, the sex chromosomes are XY. So, the karyotype of a human male would comprise 22 pairs of autosomal chromosomes, an X chromosome, and a Y chromosome.
B. Photosynthesis is the supposedly correct answer.
