heterozygous. an organism that has two different alleles for a trait (hybrid)
What does it mean to be heterozygous example?
If the two versions are different, you have a heterozygous genotype for that gene. For example, being heterozygous for hair color could mean you have one allele for red hair and one allele for brown hair. The relationship between the two alleles affects which traits are expressed.
What is a heterozygous genotype quizlet?
heterozygous. Having two different alleles on a gene for a given trait or characteristic. ( hybrid) homozygous dominant. Having two identical alleles on a gene which are dominant for the trait.
What is the difference between heterozygous and homozygous quizlet?
Homozygous is having two identical alleles for a particular gene. Heterozygous is having two different alleles for a particular gene.
What does heterozygous for an allele mean?
(HEH-teh-roh-ZY-gus JEE-noh-tipe) The presence of two different alleles at a particular gene locus. A heterozygous genotype may include one normal allele and one mutated allele or two different mutated alleles (compound heterozygote).
What does it mean for an organism to be heterozygous for a particular trait?
To be heterozygous for a trait is to have different alleles for it. Being homozygous for a trait means that it will always turn out the same. But being heterozygous means that the trait can develop in different ways. Remember, an organism isn’t said to be homozygous or heterozygous overall—just for a single trait.
What is the meaning of heterozygous in agriculture?
Heterozygous means there are two different alleles for the same gene. Alleles may be a dominant and recessive pair or codominant. Heterozygotes allow lethal characteristics to be passed to the next generation.
What is dominant quizlet?
Dominant. Describes a trait that covers over, or dominates, another form of that trait. Recessive. trait of an organism that can be masked by the dominant form of a trait.
What does homozygous dominant mean quizlet?
Homozygous dominant refers to the alleles both being uppercase traits. Ex. RR. Heterozygous. Heterozygous means that the alleles are two different traits.
What is the definition of a phenotype quizlet?
phenotype. the physical appearance of an organism based on the genotype (genes) pure. obtained from a cross with hybrid organisms; homozygous. recessive.
What is the definition of a dominant allele quizlet?
A dominant allele is an allele whose trait always shows up in the organism when the allele is present. … A recessive allele is an allele that is masked when a dominant allele is present.
What is the difference between heterozygous and homozygous individuals?
Homozygous and heterozygous are terms that are used to describe allele pairs. Individuals carrying two identical alleles (RR or rr) are known as homozygous. While individual organisms bearing different alleles (Rr) are known as heterozygous.
What trait will a heterozygous individual express?
Specifically, heterozygous (Ss) individuals express both normal and sickle hemoglobin, so they have a mixture of normal and sickle red blood cells. In most situations, individuals who are heterozygous for sickle-cell anemia are phenotypically normal. Under these circumstances, sickle-cell disease is a recessive trait.
What represents a heterozygous genotype?
An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype. In our example, this genotype is written Bb. Finally, the genotype of an organism with two recessive alleles is called homozygous recessive. In the eye color example, this genotype is written bb.
What is heterozygous and homozygous examples?
Heterozygous means that an organism has two different alleles of a gene. For example, pea plants can have red flowers and either be homozygous dominant (red-red), or heterozygous (red-white). If they have white flowers, then they are homozygous recessive (white-white). Carriers are always heterozygous.