75% Percent
2,000
More information is needed. The percent of offspring that will display the recessive trait from parents with Hh and HH will be different than the percent of offspring that will display the recessive trait from parents with hh and Hh.
100% of the offspring will display the dominant trait because the homozygous dominant parent can only pass on the dominant allele. The offspring will inherit one dominant allele from the dominant parent and one recessive allele from the recessive parent, resulting in a heterozygous genotype expressing the dominant trait.
No. Parents with the dominant phenotype might be heterozygous in their genotype. This means they could carry both the dominant and recessive allele for a trait. So they could both pass the recessive allele to an offspring, who would then have the homozygous recessive genotype and recessive phenotype.
Crossing Yy x Yy yields YY, 2Yy, yy. Since Y is dominant over y, then YY and 2 Yy all result in the same phenotype. Therefore 3/4 of the offspring will resemble their parents.
To produce a pea plant that only displays the recessive phenotype both of the parents must also have the recessive phenotype. In a four square, if one parent displays the recessive phenotype while the other has the dominant phenotype, one of every four offspring should theoretically receive the recessive phenotype as well, but if you want all offspring to be recessive, both parents must also be recessive. (tt)
It is possible for many people to display a recessive trait because the people have two recessive genes. Dominant simply means it will trump a recessive gene, it does not mean it is the most widely seen gene in a species.
The botanist could perform test crosses between the green-pod plant and a known homozygous recessive individual. If all offspring show the dominant green pod trait, the green-pod plant is likely homozygous. If the offspring display a mix of green and yellow pods, the green-pod plant is most likely heterozygous.
The parent plants must both be homozygous for the recessive allele of the trait (aa). This ensures that all offspring will inherit two copies of the recessive allele and display the recessive phenotype.
If one parent is homozygous dominant (AA) and the other parent is homozygous recessive (aa), all offspring will inherit one dominant allele and display the dominant phenotype. Therefore, the probability of their offspring exhibiting the dominant phenotype is 100%.
Mendel's ratios refer to the predictable patterns of inheritance observed in his genetic experiments with pea plants. The most notable ratios are the 3:1 phenotypic ratio in monohybrid crosses, indicating that three offspring display the dominant trait for every one that shows the recessive trait. In dihybrid crosses, Mendel observed a 9:3:3:1 ratio in the offspring phenotypes, representing the combinations of two traits. These ratios form the foundation of Mendelian genetics, illustrating how traits are inherited independently.
When Tt plants (heterozygous for a trait) are pollinated, they can produce offspring with the genotypes TT, Tt, and tt. This follows the principles of Mendelian genetics, where the expected phenotypic ratio among the offspring would be 3:1 for dominant to recessive traits. Therefore, about 75% of the offspring will exhibit the dominant trait, while 25% will display the recessive trait.