Lesson 5: Sex-linked Inheritance Answers

Genes are segments of DNA that are the basic unit of heredity. They are passed on from parent to offspring. The gene form of a trait is called a(n) homozygousphenotype✔ allelerecessiveheterozygousdominantX genotype.An organism’s allele combination is called the homozygousX phenotypeallelerecessiveheterozygousdominant✔ genotype.The physical appearance of an organism is called the homozygous✔ phenotypeallelerecessiveheterozygousdominantgenotype.

There are two types of alleles. An allele that masks another is the homozygousX phenotypealleleX recessiveheterozygous✔ dominantgenotype allele. The one that is masked is called the homozygousphenotypeallele✔ recessiveX heterozygousX dominantgenotype allele.An organism that has the same alleles for a particular trait is ✔ homozygousX phenotypeallelerecessiveheterozygousdominantX genotype. An organism that has different alleles for a particular trait is X homozygousphenotypeallelerecessive✔ heterozygousdominantgenotype.