0
variation in alleles of genes, occurs both within and among populations. Genetic variation is important because it provides the genetic material for natural selection. Genetic variation is brought about by mutation, which is a permanent change in the chemical structure of a gene. Polyploidy is an example of chromosomal mutation. Polyploidy is a condition wherein organisms have three or more sets of genetic variation (3n or more).
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoHomozygous genotypes means that the alleles are the same. So for example, a person with blood type A can have an Ai genotype or AA genotype. An Ai genotype would be heterozygous, while AA would be homozygous.
Wiki User
∙ 9y agoIndividuals that have two different alleles at a gene locus are said to be heterozygous.
This means that each gene locus for a trait on paired chromosomes is different.
For example: If allele B (not black) is on one chromosome and allele b (black) is on the matching
chromosome...(written Bb) the genotype for this locus is heterozygous.
Wiki User
∙ 11y agoHaving a homozygous pair of genes.
Using flower color:
PP: Purple
pp: White
Wiki User
∙ 13y agoA heterozygous genotype, is the genetic makeup of different alleles.
Wiki User
∙ 13y agogenetic make up with two identical genes with lowercase.
Wiki User
∙ 12y agoby the moon
Add your answer:
Earn +20 pts
A homozygous genotype where both alleles are recessive are called?
A recessive gene refers to an allele which is only seen in homozygous genotype.
What is dominant recessive?
There is dominant and there is recessive. There is no dominant recessive. A dominant gene will always be expressed when present, such as in the homozygous dominant genotype (RR), or heterozygous genotype (Rr). A recessive allele is only expressed when the genotype is homozygous recessive (rr).
What is the genotype of an albino?
An albino has all recessive genes for pigmentation. Hence there is no expression for pigment. In other words the genotype of an albino is homozygous recessive.
What is the name for a cross between an individual of unknown genotype and a homozygous recessive?
A cross between a homozygous recessive and an individual of unknown genotype is called a test cross.The homozygous recessive can only pass on a recessive allele to the offspring, and so any recessive in the other parent will show up in the phenotype (detectable characteristics) of some of the offspring.
What is the differences between homozygous dominant and homozygous recessive and heterozygous?
A homozygous dominant genotype means that both alleles for a trait are dominant. A heterozygous genotype means that one allele is dominant and the other is recessive. A heterozygous genotype will express the dominant phenotype, not the recessive phenotype.
A homozygous genotype where both alleles are recessive are called?
A recessive gene refers to an allele which is only seen in homozygous genotype.
What is dominant recessive?
There is dominant and there is recessive. There is no dominant recessive. A dominant gene will always be expressed when present, such as in the homozygous dominant genotype (RR), or heterozygous genotype (Rr). A recessive allele is only expressed when the genotype is homozygous recessive (rr).
What represent a homozygous recessive genotype?
Tt
Is TTT an example of a homozygous recessive genotype?
No
What is the genotype of an albino?
An albino has all recessive genes for pigmentation. Hence there is no expression for pigment. In other words the genotype of an albino is homozygous recessive.
Which genotype is used in a test cross?
A homozygous recessive as male parent
What is the genotype for homozygous recessive?
yes, also dominate
What is the name for a cross between an individual of unknown genotype and a homozygous recessive?
A cross between a homozygous recessive and an individual of unknown genotype is called a test cross.The homozygous recessive can only pass on a recessive allele to the offspring, and so any recessive in the other parent will show up in the phenotype (detectable characteristics) of some of the offspring.
What is the differences between homozygous dominant and homozygous recessive and heterozygous?
A homozygous dominant genotype means that both alleles for a trait are dominant. A heterozygous genotype means that one allele is dominant and the other is recessive. A heterozygous genotype will express the dominant phenotype, not the recessive phenotype.
What genotype must the person have who possessed the recessive phenotypes?
The genotype is homozygous recessive or the recessive trait is on the X chromosome and has no corresponding allele on the Y chromosome.
What is recessive gene and dominant gene?
A dominant gene is always expressed if present, and the recessive gene is only expressed with the homozygous recessive genotype. For example, if the dominant gene is red (represented by the letter R) and the recessive gene is white (represented by the letter r), then a homozygous dominant organism's genotype will be RR, and its phenotype will be red. If the organism is homozygous recessive, then the genotype will be rr and the phenotype will be white. If the organism is heterozygous, then the genotype will be Rr, and the organism will be red.
In a testcross an organism with a dominant phenotype but unknown genotype is crossed with what to establish its genotype?
homozygous recessive
