Answer:
C.) 26 - 13
Explanation:
During mitosis, DNA is replicated during the S phase so that when the cell divides the daughter cells will have the same number of chromosomes that the parent cell had.
DNA replication also occurs during meiosis, but the cell divides twice, so the daughter cells will have half the number of chromosomes that the parent cell had. This is because the daughter cells are sex cells, which combine with another sex cell (either an egg or a sperm) to form one cell with a combined chromosome number.
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.
Answer: The complimentary base pairs would be:
a. TATCTGAATCGG
b. CTGTAAGTGACC
c. CGTTATGAACCG
d. TATCGATGGCAT
e. CAGGGTACGTTC
Explanation:
A combines with T and vice versa.
Similarly G combines with C and vice versa.
Attached is a picture/diagram of both a gram negative bacteria and a gram positive bacteria. This question most likely pertains to gram negative bacteria as only gram negative bacteria as an outer lipopolysaccharide (LPS) membrane.
It should be noted that there must be an error in the question as the bacterial cell wall comprises of the peptidoglycan layer (for gram positive) or the outer membrane plus the peptidoglycan layer (in gram negative). The better question would be what is the space between the cell wall and the plasma membrane in a prokaryotic cell, and the answer is the periplasmic space.
Answer:
Environmental awareness is an incredibly important part of our lives. In order to protect the sustainability of the planet, everyone needs to commit to becoming more environmentally aware. Environmental degradation is detrimental and is jeopardising the long-term health and security of animals, plants and humans.
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