An organism with two identical alleles;
Correct answer: D. Homozygous
- A. Dominant
- B. Hybrid
- C. Heterozygous
- D. Homozygous
Explanation
The correct answer is Homozygous. An organism is homozygous if it has two identical alleles for a gene, which can be either dominant or recessive. This is distinct from being 'heterozygous,' where the alleles differ. The term 'dominant' refers to an allele's expression rather than the alleles' identity. A 'hybrid' describes the offspring of genetically different parents, not the state of individual alleles within a gene.
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
In a cross between AABB × aabb, the ratio of F2 genotypes between AABB, AaBB, Aabb and aabb would be:
Sickle cell anaemia induce to:
Two nonallelic genes produces the new phenotype when present together but fail to do so independently then it is called:
RR (Red) Antirrhinum is crossed with white (WW) one. Offspring RW are pink. This is an example of
All the genes/alleles found in a breeding population at a given time are collectively termed as:
Genes A, B, C, and D are located on the same chromosome. The recombination frequencies (RF) are as follows:What is the most likely order of the genes on the chromosome?Relationship. RFA-B. 8%A-C. 23%A-D. 19%B-C. 10% C-D. 52%