Answer:
Genotypic ratio = 1:2:1
Phenotypic ratio = 3 tongue rollers : 1 non-tongue roller
Explanation:
This question involves a gene coding for the ability to roll the tongue or not in humans. The allele for tongue rolling (R) is dominant over the allele for non-tongue rolling (r).
According to this question, two individuals that are heterozygous for tongue rolling mate i.e. Rr × Rr. The proportion of offsprings that will be likely produced from this cross will be: RR, Rr, Rr, and rr.
- Offsprings with RR, Rr, Rr are tongue rollers
- Offsprings with 'rr' are non-tongue rollers.
Hence, the predicted genotypic and phenotypic ratio are as follows:
Genotypic ratio = 1 RR :2Rr :1rr
Phenotypic ratio = 3 tongue rollers : 1 non-tongue roller
Answer:
C) Gene flow
Explanation:
Gene flow refers to the movement of alleles between local populations. It results from the migration of individuals. Two adjacent populations can exhibit gene flow due to the mating between their individuals and can have significant evolutionary consequences as it does not allow the reproductive isolation of these populations. In the given example, the two mice populations are present on either side of a river. Mating between the mice of the two populations resulted in gene flow and maintained resemblance among their members.
Answer:
The duplication of DNA is called <u>replication</u>, the copying of DNA to mRNA is called <u>transcription</u>, and the reading of the mRNA by the cell to make a protein is called <u>translation</u>.
Explanation:
Replication is the gradual, repetitive, bidirectional, antiparallel and semi-conservative process; whereby the DNA is duplicated, guaranteeing the availability of a copy of the genome of the stem cell, for each of the daughter cells, in other words, it is the mechanism that allows the DNA to duplicate (that is, synthesize an identical copy of itself).
Transcription is the process by which the genes found in the chromosome DNA are selectively located, recognized and transcribed, producing mRNA, ribosomal (structural) and transfer RNA (adapters).
Messenger RNA is the one that carries the information for protein synthesis, that is, it determines the order in which the amino acids will bind. Translation is the process by which protein synthesis occurs, by decoding or reading the message of (mRNA).
Evidence would the fossils they left in the grounds they found.
Answer:
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