Problem: In genetics, the dash symbol (–) is
a “wild card”
that stands for either the dominant allele
What is RR an example of?
The combination of
alleles
carried by an individual is its genotype. For example, let's say R (read “big R”) is the dominant round allele, and r (read “little r”) is the recessive wrinkled allele. True-breeding round peas would have two copies of the R allele and a genotype of RR.
What is RR and RR?
Rr = round
.
rr = wrinkled
. The gametes for each individual could be either R or r, with a 50% chance for either. In this case, the genotypic ratio would be 1:2:1. Another way to think of this would be 1 individual with the genotype RR, 2 individuals with the genotype Rr, and 1 individual with the genotype rr.
What is the RR genotype called?
The
heterozygous genotype
(Rr) has the dominant round seed shape as its recessive allele (r) is masked in the phenotype.
What does RR mean in biology?
| Symbol Genotype Name Phenotype | RR homozygous (pure) dominant red thoat | Rr heterozygous (hybrid) red throat | rr homozygous (pure) recessive white throat |
|---|
What is RR short for?
| Acronym Definition | RR Relative Risk (medical/statistical) | RR Railroad | RR Road Runner | RR Resource Record |
|---|
What trait is RR?
The (RR) genotype is
homozygous dominant
and the (rr) genotype is homozygous recessive for seed shape.
Is FF heterozygous or homozygous?
| Genotype Phenotype | 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) |
|---|
What is the genotype for white fish?
White is the recessive phenotype, and it is produced by the
homozygous recessive (aa) genotype
.
What genotype is BB?
An organism with two dominant alleles for a trait is said to have a
homozygous dominant genotype
. Using the eye color example, this genotype is written BB. An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype.
Is DD dominant or recessive?
Humans have two versions of all autosomal genes, called alleles, one from each parent. The
recessive trait is hidden
in the heterozygous individual (Dd) if the other allele is inherited in a dominant fashion, and so this person is a called a “carrier” of the recessive allele, but does not manifest the disease or trait.
Is R dominant or recessive?
Thus, allele R is dominant over allele r, and
allele r is recessive to allele R
. Dominance differs from epistasis, the phenomenon of an allele of one gene masking the effect of alleles of a different gene.
When red and white flowers are crossed pink flowers are produced?
Explanation:
Incomplete dominance
is an example of a non-mendelian trait (doesn't follow the genetic rules established by Gregor Mendel). When two parents mate and produce offspring, the offspring is a blend of the two parents. So, a red flower and a white flower would make a pink flower.
Is TT homozygous dominant?
| Genotype Definition Example | Heterozygous One dominant allele and one recessive allele Tt | Homozygous dominant Two dominant alleles TT | Homozygous recessive Two recessive alleles tt |
|---|
What is in a gene?
Genes are
made up of DNA
. Some genes act as instructions to make molecules called proteins. However, many genes do not code for proteins. In humans, genes vary in size from a few hundred DNA bases to more than 2 million bases.
What does RR mean in Snapchat?
Summary of Key Points
“
Restroom
” is the most common definition for RR on Snapchat, WhatsApp, Facebook, Twitter, Instagram, and TikTok. RR. Definition: Restroom.
