Table of Contents
- 1 Is TT dominant or recessive?
- 2 What is a dominant and recessive cross?
- 3 What is the phenotype Bobtails in cats are recessive TT?
- 4 Is FF heterozygous or homozygous?
- 5 How can you tell if a trait is dominant or recessive?
- 6 Is PP genotype or phenotype?
- 7 How do you know if someone is homozygous or heterozygous?
- 8 Is KK homozygous dominant?
Is TT dominant or recessive?
Genotype and Phenotype
|Homozygous||Two of the same allele||TT or tt|
|Heterozygous||One dominant allele and one recessive allele||Tt|
|Homozygous dominant||Two dominant alleles||TT|
|Homozygous recessive||Two recessive alleles||tt|
What is a dominant and recessive cross?
A testcross examines the genotype of an organism that shows the dominant phenotype for a given trait. In a testcross, an organism with an unknown genotype but dominant phenotype is crossed with an organism that is homozygous recessive for the same trait.
What is the phenotype Bobtails in cats are recessive TT?
Bobtails in cats are recessive. Normal tails are dominant. Round seeds are dominant to wrinkled seeds in pea plants. No-cleft chin is dominant….The male dog is homozygous recessive.
When one allele is dominant and one allele is recessive Ex RR the genotype is?
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.
Is TT a phenotype?
The offspring with the genotypes TT and Tt will have a phenotype of tall; the offspring with the genotype of tt will have a phenotype of short. If the two alleles are the same (TT or tt), the genotype is considered purebred. If the two alleles are different (Tt), the genotype is considered hybrid.
Is FF heterozygous or homozygous?
|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)|
How can you tell if a trait is dominant or recessive?
For example, if a trait tends to be directly passed from parent to child, then the odds are pretty good that the trait is a dominant one. If a trait skips generations or pops up out of nowhere, then the odds are pretty good that it is recessive.
Is PP genotype or phenotype?
There are three available genotypes, PP (homozygous dominant ), Pp (heterozygous), and pp (homozygous recessive). All three have different genotypes but the first two have the same phenotype (purple) as distinct from the third (white).
What is the percentage of a homozygous dominant offspring?
|PARENT GENOTYPES||OFFSPRING PHENOTYPES|
|pure (homozygous) dominant x anything||100% of offspring with dominant trait|
|hybrid x homozygous recessive||50% dominant trait, 50% recessive trait|
|hybrid x hybrid||75% with dominant trait & 25% with recessive trait|
|homozygous recessive x homozygous recessive||100% recessive trait|
What are the 3 laws of Mendel?
Answer: Mendel proposed the law of inheritance of traits from the first generation to the next generation. Law of inheritance is made up of three laws: Law of segregation, law of independent assortment and law of dominance.
How do you know if someone is homozygous or heterozygous?
If an organism has identical genes on both chromosomes, it is said to be homozygous. If the organism has two different alleles of the gene it is said to be heterozygous.
Is KK homozygous dominant?
“KK” is a homozygote for the dark green gene. Most autosomal dominant mutations are incomplete (as is this one) meaning that the heterzygote has a different phenotype (or appearance) than both the homozygous dominant form (KK) and the homozygous recessive for (kk)….