13. If purple (P) flowers are dominant to white (p) flowers, which is true about the genotype Pp?
A. It is homozygous and results in white flowers.
B. It is heterozygous and results in white flowers. *****
C. It is heterozygous and results in purple flowers.
D. It is homozygous and results in purple flowers.
14. If a hybrid individual was crossed with a heterozygous individual, what is the probability that the offspring will be homozygous recessive?
A. 100%
B. 75%
C. 50%
D. 25% ******
15. If purple skin is dominant to blue in widgets, what percentage of the offspring between a homozygous dominant purple widget and a heterozygous purple widget would also be purple???
A. 75%
B. 25%
C. 100%
D. 0%
Please Mrs. Sue, i really dont understand this, please im begging you! :(
To answer these questions, it is important to understand the basics of genetics and inheritance patterns. In particular, we need to understand the concepts of dominant and recessive alleles, as well as the genotypes and phenotypes associated with them.
13. The genotype Pp represents a heterozygous individual. In this case, purple (P) is dominant over white (p). Therefore, the individual with the genotype Pp will have purple flowers. Therefore, the correct answer is B. It is heterozygous and results in white flowers.
14. When a hybrid individual (heterozygous individual) is crossed with a heterozygous individual, we need to consider the Punnett square to determine the probability of obtaining offspring with a particular genotype. In this case, we are interested in the probability of offspring being homozygous recessive.
The Punnett square for this cross would look like this:
Hybrid Individual (Heterozygous): Hh
Heterozygous Individual: Hh
| H | h |
---------------------------
H | HH | Hh |
---------------------------
h | Hh | hh |
From the Punnett square, we can see that there is a 25% chance (1 out of 4) of the offspring being homozygous recessive (hh). Therefore, the correct answer is D. 25%.
15. We are given that purple skin is dominant to blue in widgets and we are looking to determine the percentage of offspring that would be purple. In this case, we have a homozygous dominant purple widget (PP) crossed with a heterozygous purple widget (Pp).
Using the Punnett square, we can determine the possible genotypes and phenotypes of the offspring:
Homozygous dominant (PP) x Heterozygous (Pp):
| P | p |
----------------------------
P | PP | Pp |
----------------------------
p | Pp | pp |
From the Punnett square, we can see that 100% of the offspring will have the purple phenotype (either PP or Pp). Therefore, the correct answer is C. 100%.