What does homozygous recessive mean?
Homozygous means that the organism has two copies of the same allele for a gene. An organism can be homozygous dominant, if it carries two copies of the same dominant allele, or homozygous recessive, if it carries two copies of the same recessive allele.
What is homozygous recessive quizlet?
Homozygous recessive means that the alleles will be both lowercase traits. Ex. rr. Homozygous Dominant. Homozygous dominant refers to the alleles both being uppercase traits.
What does homozygous recessive example?
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 do the terms homozygous and heterozygous mean quizlet?
Homozygous means that. An offspring either has 2 copies of the dominant allele or 2 copies of the recessive allele. Heterozygous means that. The offspring has 1 copy of the dominant allele and 1 copy of the recessive allele.
What does homozygous and heterozygous mean?
Heterozygous refers to having inherited different forms of a particular gene from each parent. A heterozygous genotype stands in contrast to a homozygous genotype, where an individual inherits identical forms of a particular gene from each parent.
What is a recessive allele?
Recessive refers to a type of allele which will not be manifested in an individual unless both of the individual’s copies of that gene have that particular genotype.
What is homozygous quizlet?
homozygous. an organism that has two identical alleles for a trait (purebread) phenotype.
What is the term heterozygous 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 is homozygous condition?
Homozygous is a genetic condition where an individual inherits the same alleles for a particular gene from both parents.
How is a homozygous recessive trait written?
When a particular gene has identical alleles (versions) of chromosomes inherited from both parents, the gene is homozygous. A homozygous trait is referred to by two capital letters (XX) for a dominant trait, and two lowercase letters (xx) for a recessive trait.
What does the word recessive mean in science?
recessive. [ rĭ-sĕs′ĭv ] Tending to go backward or recede. Of, relating to, or being an allele that does not produce a characteristic effect when present with a dominant allele. Of, relating to, or being a trait expressed only when the determining allele is present in the homozygous condition.
Which is an example of a heterozygous allele quizlet?
Heterozygous alleles are alleles that act on different colors. For example allele for blue & allele for black.
What is an example of homozygous dominant genotype?
A homozygous dominant genotype is one in which both alleles are dominant. For example, in pea plants, height is governed by a single gene with two alleles, in which the tall allele (T) is dominant and the short allele (t) is recessive.