Answer No 1:
The trait which is being studied in the cross is the height of the pea plant.
Answer No 2:
The two alleles for this trait are tall height allele which we can write as T and the allele for short height which we can write as t.
Answer No 3:
The allele for tall height is the dominant allele. We can say this because when a cross between a dominant homozyous and a recessive plant were made the offsprings resulted in the tall plants which is the F1 generation in the figure. As a dominant trait masks the recessive trait, hence we can say that the tall height allele is dominant over the short height allele.
Answer No 4:
The allele for short height t is recessive because as we can see the short height trait is being masked by the tall height trait in the F1 progeny. In F2 progeny, there are more number of tall height plants produced which further prove that short height is the recessive trait.
Answer No 5:
The F1 offsprings will have a dominant tall height allele, T, and a recessive short height allele, t. The dominant allele was inherited from the tall parent and the short height allele, t, was inherited from the recessive parent.
We can say that because the F2 progeny shows some plants to have short heights which is only possible if the F1 generation has heterozygous dominant (Tt) alleles.
Part 1.
The correct answer is option 2.There are two alleles for freckles.
According to the condition of the occurrence of the freckles, it can be concluded that the freckle is an autosomal dominant condition. The freckle can only be inherited, if there is at least one dominant allele in any of the parent. If both the individuals are heterozygous for the trait, they can produce an offspring without freckle by passing down the recessive alleles to the progeny. So, the freckles are controlled by two alleles, which can be either dominant or recessive.
Part 2.
The correct answer is option 4. P generation and F2 generation.
In this case, it is given that true bred homozygous recessive plant is crossed with true bred homozygous dominant plant. The true bred recessive plant always shows the recessive phenotype. When true bred homozygous recessive plant is crossed with true bred homozygous dominant plant, the F1 generation would produce all the heterozygous individual and exhibit dominant phenotype. When the F1 generation is self crossed, it result in 75% dominant phenotype and 25% recessive phenotype.
A possible cross for this case is given in the picture.
Answer:
The correct answer will be- Meiosis I, anaphase I
Explanation:
Alleles are the variant alternative forms of a gene which determines the trait of an organism. The trait or phenotype is expressed only when the two alleles controlling a single trait on separate chromosomes are aligned in a complementary position.
During gamete formation, the alleles controlling a trait segregate independently of each other. This segregation of alleles takes place during Anaphase I of meiosis I. During anaphase, the sister chromatids are separated by the mitotic spindles so that the chromosomes can reach the opposite poles.
Thus, Meiosis I, anaphase I am the correct answer.
Answer:
I think it's C but I might be wrong so I apologize if I am.
NUCLEUS IS CALLED CONTROL CENTRE OF THE CELL BECAUSE IT PERFORMS TWO MAIN PRINCIPAL FUNCTIONS:
1. Contains genetic information for structure, reproduction , development, metabolism and behaviour. ...
2 Controls cellular activities through directing synthesis of particular proteins and enzymes.
Explanation:
It contains the genetic instructions for every function of the cell. It is the cell's powerhouse and processes energy for the cell. It is responsible for packaging proteins for delivery out of the cells.
