|F F||Homozygous dominant||No cystic fibrosis (Normal)|
|F f||Heterozygous||Carrier (has no symptoms but carries the recessive allele)|
|f f||Homozygous recessive||Cystic fibrosis (has symptoms)|
Is FF a heterozygous genotype?
Having freckles is a third example of a dominant trait. … Because Luke gets one allele from Sally and one from John, Luke has a 25 percent change of have a homozygous dominant genotype of “FF,” a heterozygous dominant genotype of “Ff” and a homozygous recessive genotype of “ff.”
What is FF genotype?
~50% (2 out of 4 possible offspring will have a genotype (Ff) that results in a. dominant phenotype. ff = recessive non-freckled offspring)
What is an example of heterozygous?
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.
Which genotype is purebred?
Purebred – Also called HOMOZYGOUS and consists of gene pairs with genes that are the SAME. Hybrid – Also called HETEROZYGOUS and consists of gene pairs that are DIFFERENT. Genotype is the actual GENE makeup represented by LETTERS.
What is the genotype for someone without freckles?
These are the allele pairs that makeup the genotype. Recessive Trait (No Freckles)- observable (represented by a lowercase letter) EX: f ff is the only possible allele pair that can makeup the genotype.
Are freckles recessive?
They’re also permanent, and won’t fluctuate with a person’s exposure to UV rays. We also know that freckles are linked to a key genetic determinant for skin and hair color, which is a gene called MC1R. … Red hair is a recessive trait, and freckles are dominant. Both red hair and freckles run in my family.
What are 3 heterozygous 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.