This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
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Here are the solutions to the questions: 1.1.1 The main purpose of cloning is to create genetically identical copies of an organism. The correct option is D. D) organisms with identical genes. 1.1.2 Genetic variation in gametes is primarily introduced by two main processes during meiosis: crossing-over and independent assortment. Crossing-over is the exchange of genetic material between homologous chromosomes, which occurs during prophase I. This process directly creates new combinations of alleles on the chromosomes. The correct option is D. D) crossing-over. 1.1.3 Blood groups are determined by alleles I^A, I^B, and i. A genotype represents the combination of two alleles an individual possesses. A and B are blood phenotypes (types). ii is a genotype that results in blood type O. Crossing-over is a genetic process, not a genotype. The correct option is C. C) ii. 1.1.4 The parent plant is homozygous dominant for round seed shape (RR) and homozygous for tall stem height (TT). Therefore, its genotype is RRTT. During gamete formation, each gamete receives one allele for each gene. From RRTT, only one type of gamete can be formed, which will carry one R allele and one T allele. The correct option is B. B) RT. 1.1.5 Gonosomes are sex chromosomes. Human females have two X chromosomes (XX), which are homologous and generally of similar size. Human males have one X and one Y chromosome (XY). The X chromosome is significantly larger than the Y chromosome. Therefore, the difference is that female gonosomes are of the same size, while male gonosomes are not. The correct option is A. A) females gonosomes are of the same size. Drop the next question 📸