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.
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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.
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