A botanist sees that when he breeds a plant with blue flowers and a plant with red flowers, the resulting generation are plants with a 1:1 ratio of blue: red flowers. He knows that the two parents are homozygous for the trait of color. What phenomenon most likely explains the 1:1 ratio in the filial generation?
Correct answer: D. Codominance
- A. Incomplete dominance
- B. Independent assortment
- C. Penetrance
- D. Codominance
Explanation
The phenomenon which describes the 1:1 ratio in the final generation is Codominance, which relates to genetics, refers to a type of inheritance in which two versions (alleles) of the same gene are expressed separately to yield different traits in an individual.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
Practise Inheritance
1,238 free Inheritance MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Inheritance questions
If the gene expresses itself, then the penetrance is:
In a dihybrid cross, what fraction of offsprings is homozygous for both traits?
The number of autosomes in the human sperm is:
A pure breeding tall pea plant was crossed to a dwarf plant what will be the frequency of dwarf plants in F2?
Phenotype represents which of the following?
The phenomenon in which the effect of one allele in a heterozygous genotype completely masks the effect of the other is called _.