An organism’s genotype is (1 point)
Responses
an observable trait.
an observable trait.
a trait that is expressed in a homozygous individual.
a trait that is expressed in a homozygous individual.
the set of alleles an organism has for a trait.
the set of alleles an organism has for a trait.
an allele that is expressed whenever it is present.
the set of alleles an organism has for a trait.
The correct answer is: the set of alleles an organism has for a trait.
The correct answer is the set of alleles an organism has for a trait. To understand why, let's break down the options:
1) "an observable trait" - This option describes a phenotype, which refers to the physical or observable characteristics of an organism, not its genotype.
2) "a trait that is expressed in a homozygous individual" - While homozygosity can influence the expression of a trait, it does not define the genotype itself.
3) "the set of alleles an organism has for a trait" - This is the correct answer because an organism's genotype consists of the combination of alleles it possesses for a specific trait. Alleles are alternative forms of a gene, and an organism's genotype determines which alleles it has.
4) "an allele that is expressed whenever it is present" - This describes the concept of dominance, where an allele's presence results in its expression over other alleles. However, it does not capture the entirety of an organism's genotype.
Understanding the difference between genotype (the set of alleles an organism has for a trait) and phenotype (the physical expression of those alleles) is crucial in genetics.
Genes have different forms, called(1 point)
Responses
phenotypes.
phenotypes.
traits.
traits.
alleles.
alleles.
genotypes.
The correct answer is alleles.
How are the plant height genotypes TT and Tt similar?(1 point)
Responses
Both are expressed as a tall phenotype.
Both are expressed as a tall phenotype.
Both are examples of homozygous genotypes.
Both are examples of homozygous genotypes.
Both are expressed as a short phenotype.
Both are expressed as a short phenotype.
Both are examples of heterozygous genotypes
The correct answer is: Both are expressed as a tall phenotype.
Which option shows all allele combinations that can be used to represent a purebred animal?(1 point)
Responses
tt
tt
TT or tt
TT or tt
TT or Tt
TT or Tt
Tt