In pea plants, the allele for purple flowers, P, is dominant over the allele for white flowers, p. Which conclusion about phenotype and genotype is possible?(1 point)
Responses
If a plant has purple flowers, then its genotype must be Pp.
If a plant has purple flowers, then its genotype must be Pp .
If a plant has purple flowers, then its genotype must be PP.
If a plant has purple flowers, then its genotype must be PP .
If a plant has white flowers, then its genotype must be Pp.
If a plant has white flowers, then its genotype must be Pp .
If a plant has white flowers, then its genotype must be pp.
If a plant has white flowers, then its genotype must be pp .
Correct conclusion: If a plant has white flowers, then its genotype must be pp.
What is a phenotype of an organism?(1 point)
Responses
an observable trait
an observable trait
a structure that carries genetic information
a structure that carries genetic information
a section of DNA
a section of DNA
a combination of alleles
Correct response: An observable trait.
To determine the correct conclusion about the phenotype and genotype of pea plants, we need to understand the inheritance pattern of flower color in pea plants. According to the given information, the allele for purple flowers (P) is dominant over the allele for white flowers (p).
If a plant has purple flowers, it can have two possible genotypes: PP or Pp. In this case, the dominant allele (P) determines the purple flower color. Therefore, both "If a plant has purple flowers, then its genotype must be Pp" and "If a plant has purple flowers, then its genotype must be PP" are possible conclusions.
If a plant has white flowers, it can only have one possible genotype: pp. Since the recessive allele (p) doesn't produce any pigment, it results in the white flower color. Hence, the correct conclusion is "If a plant has white flowers, then its genotype must be pp."
The correct conclusion is: If a plant has white flowers, then its genotype must be pp.
What is an allele?(1 point)
Responses
the trait a gene controls
the trait a gene controls
a dominant form of a gene
a dominant form of a gene
the location of a gene on a chromosome
the location of a gene on a chromosome
a form of a gene
a form of a gene
Correct response: A form of a gene.
Use the table to answer the question.
Plant A Plant B Plant C
tt TT Tt
The table shows the genotypes of three pea plants for the allele for height. Which prediction about the three plants is the most reasonable?
(1 point)
Responses
Plant C will be the shortest.
Plant C will be the shortest.
Plant A will be the tallest.
Plant A will be the tallest.
Plant A and Plant C will have similar heights.
Plant A and Plant C will have similar heights.
Plant B and Plant C will have similar heights
Based on the given information and the inheritance pattern of the allele for height, we can conclude the following:
- Plant A: tt genotype - Homozygous recessive for the short height allele.
- Plant B: TT genotype - Homozygous dominant for the tall height allele.
- Plant C: Tt genotype - Heterozygous, having one allele for tall height and one allele for short height.
From this information, the most reasonable prediction is that Plant A will be the shortest since it has two copies of the short height allele (tt), while Plant B will be the tallest because it has two copies of the tall height allele (TT). Plant C will have an intermediate height since it carries one allele for tall height (T) and one allele for short height (t). Therefore, the correct conclusion is: Plant A will be the shortest.