Question
In one of his classic experiment using pea color, Mendel conducted two genetic crosses. In the first cross the parent plants were either yellow (Y) or green (y) for seed color. The first cross produced a filial 1 generation of all yellow peas. In the second cross, Mendel bred plants from the filial 1 generation and this second cross produced different results: one of every four plants had green seeds.
From these genetic crosses, Mendel developed what hypotheses?
Responses
A An organism inherits two genes for any trait, one from each parent. An organism inherits two genes for any trait, one from each parent.
B For any trait, one inheritable factor may be dominant and mask the other factor..For any trait, one inheritable factor may be dominant and mask the other factor..
C In any genetic cross, a sperm or egg carries only one inheritable factor for each trait in the offspring. In any genetic cross, a sperm or egg carries only one inheritable factor for each trait in the offspring.
D If inheritable factors come from parents, then there is only a chance that offspring will inherit those factors.If inheritable factors come from parents, then there is only a chance that offspring will inherit those factors.
Question 2
Imagine you are looking out at a field of sunflowers. 774 plants are tall (T) and 226 plants are short (t). Based on Mendel's original work, what can you say about the genotypes of the parents of this field of flowers?
Responses
A Parent 1 = Tt; Parent 2 = TtParent 1 = Tt; Parent 2 = Tt
B Parent 1 = TT; Parent 2 = ttParent 1 = TT; Parent 2 = tt
C Parent 1 = TT; Parent 2 = TtParent 1 = TT; Parent 2 = Tt
D You cannot determine anything about the parents without seeing them.
From these genetic crosses, Mendel developed what hypotheses?
Responses
A An organism inherits two genes for any trait, one from each parent. An organism inherits two genes for any trait, one from each parent.
B For any trait, one inheritable factor may be dominant and mask the other factor..For any trait, one inheritable factor may be dominant and mask the other factor..
C In any genetic cross, a sperm or egg carries only one inheritable factor for each trait in the offspring. In any genetic cross, a sperm or egg carries only one inheritable factor for each trait in the offspring.
D If inheritable factors come from parents, then there is only a chance that offspring will inherit those factors.If inheritable factors come from parents, then there is only a chance that offspring will inherit those factors.
Question 2
Imagine you are looking out at a field of sunflowers. 774 plants are tall (T) and 226 plants are short (t). Based on Mendel's original work, what can you say about the genotypes of the parents of this field of flowers?
Responses
A Parent 1 = Tt; Parent 2 = TtParent 1 = Tt; Parent 2 = Tt
B Parent 1 = TT; Parent 2 = ttParent 1 = TT; Parent 2 = tt
C Parent 1 = TT; Parent 2 = TtParent 1 = TT; Parent 2 = Tt
D You cannot determine anything about the parents without seeing them.
Answers
GPT-4o mini
For Question 1, the correct response based on Mendel's experiments is:
**A** An organism inherits two genes for any trait, one from each parent.
(Though B and C are also true statements derived from Mendel's work, A captures the essence of his discoveries regarding inheritance.)
For Question 2, we can calculate the expected ratio of tall to short plants based on Mendel's principles. Since a 3:1 ratio of tall to short plants is observed among the offspring, it suggests that the parents were both heterozygous for tallness. Therefore, the most appropriate genotype for the parents would be:
**A** Parent 1 = Tt; Parent 2 = Tt
This is consistent with a classic dihybrid cross where both parents contribute a heterozygous genotype.
**A** An organism inherits two genes for any trait, one from each parent.
(Though B and C are also true statements derived from Mendel's work, A captures the essence of his discoveries regarding inheritance.)
For Question 2, we can calculate the expected ratio of tall to short plants based on Mendel's principles. Since a 3:1 ratio of tall to short plants is observed among the offspring, it suggests that the parents were both heterozygous for tallness. Therefore, the most appropriate genotype for the parents would be:
**A** Parent 1 = Tt; Parent 2 = Tt
This is consistent with a classic dihybrid cross where both parents contribute a heterozygous genotype.