Answer:
The S phase of a cell cycle occurs during interphase in meiosis is responsible for the synthesis or replication of DNA.
Answer:
The correct answers: B, C and D.
Explanation:
- X-ray diffraction studies of the DNA reveal the following:
- The DNA is comprised of two strands which are coiled around each other in the shape of a helix.
- The backbone of the DNA is made up of phosphate and deoxyribose groups, alternately, which are exposed towards the outside of the helix.
- The nitrogenous bases which form the hydrogen bonds that link the two helices are directed towards the centre of the helix.
Answer:
Skin pigmentation in humans
Explanation:
Skin pigmentation is a very common example in polygenic inheritance. This inheritance is represented by two gene pairs: Aa and Bb.
Thus, A and B determine the production of the same amount of melanin pigment and have additive effect. Therefore, there are several shades of color in human skin, according to the amount of genes A and B.
Offspring of parents with one very dark skinned and one very light skinned may give an intermediate skin color. Heterozygous parents for skin color can lead to offspring with darker or lighter skin than their own.
Answer:
im learning this rn
Explanation:
what are the choices? cant answer if u dont give the choices
a) RR red BB Blue and RB purple are the genotypes of flower colour in incomplete dominance.
b) 0% probability
c) There is 100% probability of purple colour flowers
d) 0% probability
Explanation:
a)If a poofkin with red flower is crossed with blue flowers:
Alleles for red colour RR
Alleles for blue colour BB
By Punnett square:
R R
B RB RB
B RB RB
b) genotype of red flower = no red flower hence 0% probability
c) probability of purple flowers = 100%
d) probability of blue flowers = 0% probability
The incomplete dominance is a phenomenon in which both the genotypes are expressed in the phenotype of the progeny. It occurs when both the alleles of the gene are dominant over each other resulting into intermediate characteristic. The heterozygous progeny will be the intermediate in phenotypic characters.