Question

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) allele.
an organisms allele combination is called the genotype.
the physical appearance of an organism is called the phenotype.
complete
there are two types of alleles. an allele that masks another is the dominant allele. the one that is masked is called the recessive allele.
an organism that has the same alleles for a particular trait is
an organism that has different alleles for a particular trait is
done

Explanation:

• For "An organism that has the same alleles for a particular trait":
• In genetics, when an organism has two identical alleles for a specific trait, it is defined as homozygous. For example, in pea plants, if a plant has two alleles for tallness (\(TT\)), it is homozygous for the tall trait.
• For "An organism that has different alleles for a particular trait":
• When an organism has two different alleles for a trait, it is called heterozygous. Using the pea - plant example, if a plant has one allele for tallness (\(T\)) and one for shortness (\(t\)) (\(Tt\)), it is heterozygous for the height trait.

Answer:

• An organism that has the same alleles for a particular trait: homozygous
• An organism that has different alleles for a particular trait: heterozygous