Westonci.ca is your go-to source for answers, with a community ready to provide accurate and timely information. Our platform provides a seamless experience for finding reliable answers from a network of experienced professionals. Join our Q&A platform to connect with experts dedicated to providing accurate answers to your questions in various fields.
Sagot :
To determine the most likely genotypes of the parents that result in 100 percent heterozygous offspring for the trait of plant height, let's analyze each potential cross mentioned:
1. Cross: [tex]$Tt \times tt$[/tex]
- One parent is heterozygous ([tex]$Tt$[/tex]), and the other parent is homozygous recessive ([tex]$tt$[/tex]).
- The possible offspring from this cross would be:
- [tex]$Tt$[/tex] (from T from the first parent and t from the second parent)
- [tex]$tt$[/tex] (from t from both parents)
- The genotypes of the offspring: [tex]$Tt$[/tex] and [tex]$Tt$[/tex].
- Since all offspring (100%) are heterozygous ([tex]$Tt$[/tex]), this cross is a suitable candidate.
2. Cross: [tex]$Tt \times Tt$[/tex]
- Both parents are heterozygous ([tex]$Tt$[/tex]).
- The possible offspring from this cross would be:
- [tex]$TT$[/tex] (from T from both parents)
- [tex]$Tt$[/tex] (from T from one parent and t from the other parent)
- [tex]$Tt$[/tex] (from t from one parent and T from the other parent)
- [tex]$tt$[/tex] (from t from both parents)
- The genotypes of the offspring: [tex]$TT$[/tex], [tex]$Tt$[/tex], [tex]$Tt$[/tex], and [tex]$tt$[/tex].
- The ratio would be approximately 1:2:1 (25% [tex]$TT$[/tex], 50% [tex]$Tt$[/tex], 25% [tex]$tt$[/tex]), so not all offspring would be heterozygous. This cross cannot result in 100% heterozygous offspring.
3. Cross: [tex]$tt \times tt$[/tex]
- Both parents are homozygous recessive ([tex]$tt$[/tex]).
- The possible offspring from this cross would be:
- [tex]$tt$[/tex] (from t from both parents)
- The genotypes of the offspring: [tex]$tt$[/tex].
- Since all offspring (100%) are homozygous recessive, not heterozygous, this cross is incorrect for the given condition.
4. Cross: [tex]$\pi \times t t$[/tex]
- The genotype [tex]$\pi$[/tex] is not a valid genotype in genetics. This suggestion appears to be erroneous or unrelated to standard genetic notation.
- Thus, we can disregard this option.
From the analysis above, the cross that results in 100% heterozygous ([tex]$Tt$[/tex]) offspring is:
[tex]$Tt \times tt$[/tex].
Therefore, the most likely genotypes of the parents are:
[tex]\[ \boxed{Tt \times tt} \][/tex]
1. Cross: [tex]$Tt \times tt$[/tex]
- One parent is heterozygous ([tex]$Tt$[/tex]), and the other parent is homozygous recessive ([tex]$tt$[/tex]).
- The possible offspring from this cross would be:
- [tex]$Tt$[/tex] (from T from the first parent and t from the second parent)
- [tex]$tt$[/tex] (from t from both parents)
- The genotypes of the offspring: [tex]$Tt$[/tex] and [tex]$Tt$[/tex].
- Since all offspring (100%) are heterozygous ([tex]$Tt$[/tex]), this cross is a suitable candidate.
2. Cross: [tex]$Tt \times Tt$[/tex]
- Both parents are heterozygous ([tex]$Tt$[/tex]).
- The possible offspring from this cross would be:
- [tex]$TT$[/tex] (from T from both parents)
- [tex]$Tt$[/tex] (from T from one parent and t from the other parent)
- [tex]$Tt$[/tex] (from t from one parent and T from the other parent)
- [tex]$tt$[/tex] (from t from both parents)
- The genotypes of the offspring: [tex]$TT$[/tex], [tex]$Tt$[/tex], [tex]$Tt$[/tex], and [tex]$tt$[/tex].
- The ratio would be approximately 1:2:1 (25% [tex]$TT$[/tex], 50% [tex]$Tt$[/tex], 25% [tex]$tt$[/tex]), so not all offspring would be heterozygous. This cross cannot result in 100% heterozygous offspring.
3. Cross: [tex]$tt \times tt$[/tex]
- Both parents are homozygous recessive ([tex]$tt$[/tex]).
- The possible offspring from this cross would be:
- [tex]$tt$[/tex] (from t from both parents)
- The genotypes of the offspring: [tex]$tt$[/tex].
- Since all offspring (100%) are homozygous recessive, not heterozygous, this cross is incorrect for the given condition.
4. Cross: [tex]$\pi \times t t$[/tex]
- The genotype [tex]$\pi$[/tex] is not a valid genotype in genetics. This suggestion appears to be erroneous or unrelated to standard genetic notation.
- Thus, we can disregard this option.
From the analysis above, the cross that results in 100% heterozygous ([tex]$Tt$[/tex]) offspring is:
[tex]$Tt \times tt$[/tex].
Therefore, the most likely genotypes of the parents are:
[tex]\[ \boxed{Tt \times tt} \][/tex]
Thank you for trusting us with your questions. We're here to help you find accurate answers quickly and efficiently. Thanks for stopping by. We strive to provide the best answers for all your questions. See you again soon. Thank you for trusting Westonci.ca. Don't forget to revisit us for more accurate and insightful answers.