The genetic data present in the DNA of an organism is different from the parent DNAs.
Explanation:
The large number of varied combination of genes are produced through the reproduction procedure. In the process of Meiosis, gametes are produced in the form of sperms and eggs. The alleles of gametes get separated and units randomly with fertilization of gametes.
In this way reproduction causes variation in genes. In humans some variations of genes are - the skin and hair color. This variation leads to a trait of an organism.
Answer: It becomes more dense when it freezes.
Explanation: water becomes less dense when it freezes because ice has a cage like structure.
Using the principle of faunal succession, if an unidentified fossil is found in the same rock layer as an index fossil, the two species must have existed during the same period of time (Figure 4). If the same index fossil is found in different areas, the strata in each area were likely deposited at the same time.
Answer:
The tasting allele is dominant.
Explanation:
- The law of dominance states that the dominant allele will always express itself in homozygous or heterozygous conditions.
- While, the recessive allele Can express itself only in Homozygous recessive condition.
- The phenotypic ratio in case of monohybrid cross is 3:1 where i.e , about 3 out of every four offspring tends to express the dominant trait.
- According to the given statistics,80% of the population can taste PTC and 20 % cannot.
- Thus The tasting allele is a dominant allele.
