Your question: Is YY homozygous or heterozygous?

YY is the homozygous dominant genotype (2 Y alleles). The phenotype of this genotype is yellow seed color. Yy is the heterozygous genotype (one dominant allele, one recessive allele).

Is F2 homozygous or heterozygous?

The second filial (F2) generation cross of true breeding parental groups yields a 1:2:1 ratio, where 25% of the time offspring will be homozygous dominant, 50% of the time, they will be heterozygous, and 25% of the time they will be homozygous recessive.

What is a homozygous vs heterozygous?

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 difference between F1 and F2 generation?

The main difference between F1 and F2 generation is that F1 generation is the first filial generation of the offspring from the parents. But, F2 generation is the second filial generation of the offspring, generated through inbreeding of F1 individuals.

What are F2 genotypes?

In F2 generation genotypic ratio will be 1:2:1. , i.e. 1 homozygous tall: 2 heterozygous tall: 1 homozygous dwarf. In dihybrid cross two traits are considered together. … Tall white will have 2 genotypes, i.e. homozygous tall homozygous white (TTrr) and heterozygous tall and homozygous white (Ttrr) in the ratio of 1:2.

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Is the genotype BB heterozygous or homozygous?

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. In our example, this genotype is written Bb.

What phenotype is TT?

What is the phenotype of a pea plant that is homozygous dominant ( TT ) for the tall trait? Tall. What is the phenotype of a pea plant that is heterozygous ( Tt )? It is also tall.

Genotype Definition Example
Heterozygous One dominant allele and one recessive allele Tt
Homozygous dominant Two dominant alleles TT

What does notation TT mean to geneticist?

The notation Tt means the heterozygous condition, wherein the homologous pair contains different alleles of a gene. … ‘Tt’ refers to the heterozygous condition with a dominant and a recessive allele and tallness being the dominant trait, it is expressed in the phenotype.

Is PP a heterozygous or homozygous?

If the genotype of the unknown plant is homozygous dominant (PP), all of the offspring will be heterozygous (Pp) and have purple petals.

What is homozygous example?

If an organism has two copies of the same allele, for example AA or aa, it is homozygous for that trait. If the organism has one copy of two different alleles, for example Aa, it is heterozygous. Keep in mind that an organism can’t simply be ‘homozygous,’ period.

What is heterozygous example?

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.

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Is F1 generation homozygous?

One parent is homozygous for one allele, and the other parent is homozygous for the other allele. The offspring make up the first filial (F1) generation. Every member of the F1 generation is heterozygous and the phenotype of the F1 generation expresses the dominant trait.

What is F1 and F2 in physics?

F1 has the magnitude of 15 N and acts on the object in a positive horizontal direction. F2 has the magnitude of 25 N and acts on the object in a positive horizontal direction at a 20-degree angle above the horizontal.

What are the differences between genotypes and phenotypes?

The genotype is a set of genes in the DNA which are responsible for the unique trait or characteristics. Whereas the phenotype is the physical appearance or characteristic of the organism. Thus, we can find the human genetic code with the help of their genotype.