RrYy x rrYy
Gametes: RY, Ry, rY, ry and rY, ry, rY, ry
Upon crossing these gametes:
- RrYY, RrYy, RrYY, RrYy
- RrYy, Rryy, RrYy, Rryy
- rrYY, rrYy, rrYY, rrYy
- rrYy, rryy, rrYy, rryy
- A dihybrid cross is made up of two people who have two features that are regulated by two different genes. Gregor Mendel's observation of pea plants that were either round or wrinkled, yellow or green, gave rise to the concept of a dihybrid cross.
- When two heterozygous people are crossed, the offspring's genotype and phenotypic ratios will be predictable. Crossing heterozygous parents would result in an estimated phenotypic ratio of 9:3:3:1.
- Deviations from these predicted ratios may point to a relationship between the two features or to a non-Mendelian method of inheritance for one or both of the traits.
- The genotypes of a specific cross or breeding experiment are predicted using the Punnett square, a square diagram.
16 different genotypes will be formed.
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B, 30% billion, because there are 8 billion people on earth and that answer makes the most logical sense
Answer:
Natural selection
Explanation:
Natural populations have variations. Organisms of a population have various genetic traits. Some of these genetic variations make the organisms better suited to the prevailing environmental conditions. These organisms are more likely to produce more progeny. Over generations, the frequency of the beneficial genetic traits increases in the population due to the higher reproductive success of the organisms with these genetic traits.
This process of differential fitness of organisms of a population where the organisms with adaptive genetic traits have survival and reproductive benefits is called natural selection.