Biology Genetics Test Verified Answers

Biology Genetics Test Verified Answers 1. What does the term heredity refer to? - Answer: Heredity is the process through which genetic traits are transmitted from parents to their offspring. 2. Can you explain what is meant by the term heterozygous? - Answer: Heterozygous describes an individual that possesses two different alleles for a specific trait. 3. What is a karyotype? - Answer: A karyotype is a photographic representation of the chromosomes of an organism, arranged in pairs by size, typically captured during the metaphase stage of cell division. 4. How would you define recessive? - Answer: A recessive trait or allele is one that does not manifest in the phenotype when a dominant allele is present. 5. What do we mean by a sex-linked trait? - Answer: A sex-linked trait is determined by a gene located on the X or Y chromosome. 6. What does homozygous mean in genetics? - Answer: An organism is considered homozygous when it has identical alleles for a specific trait. 7. What is fertilization? - Answer: Fertilization is the process where male and female gametes unite to form a zygote. 8. What does genotype signify? - Answer: The genotype refers to the specific combination of genes present for one or more traits. 9. What defines phenotype? - Answer: Phenotype is the observable physical characteristics of an organism. 10. What is a pedigree chart? - Answer: A pedigree is a diagram that outlines the familial relationships and how a trait is inherited through multiple generations. 11. What constitutes a gamete? - Answer: A gamete is a reproductive cell, which includes eggs from the mother and sperm from the father (and spores in some organisms). 12. What is a chromosome? - Answer: Chromosomes are structures found within the nucleus, composed of DNA and proteins. 13. How do you define an allele? - Answer: Alleles are different variations of a gene that can produce distinct traits. 14. What field of study does genetics encompass? - Answer: Genetics is a branch of biology that examines heredity and the variation of traits. 15. What does the term diploid refer to? - Answer: A diploid cell contains two complete sets of chromosomes. 16. What is a haploid? - Answer: A haploid refers to a cell that contains only one complete set of unpaired chromosomes. 17. What are Punnett squares used for? - Answer: Punnett squares are tools used to predict the possible outcomes of genetic crosses between individuals. 18. What is codominance? - Answer: Codominance occurs when both alleles in a gene pair are fully expressed in the phenotype, as seen in blood type AB. 19. Can you explain incomplete dominance? - Answer: Incomplete dominance is a genetic phenomenon where an individual expresses a phenotype that is an intermediate between those of the two parents, such as red and white flowers producing pink flowers.