Tutor profile: Anna C.
Subject: Basic Math
Susan has purchased 12 apples, she uses 4 of these apples to bake a pie. Her sister than brings her 17 pears. Susan decides she will also make pear pie. She uses 6 pears in the pie. If Susan wants to make more pies How many can she bake until she does not have enough left?
Susan needs four apples to bake a pie. She started with 12 apples but use four. To find out how many she has left we need to subtract. 12-4 = 8. Susan has 8 apples left because each pie needs four apples she can make two more apple pies. Susan started with 17 pears but has used 6 of them. How many does she have left? 17 - 6 = 11. If each pear pie needs 6 pears Susan can only bake one more pear pie because she would not have enough pears to make another.
If the P1 generation consists of a true-breeding recessive individual and a true-breeding dominant individual what will the genotypic and phenotypic ratios of the F1 and F2 generations be?
If the parent generations consist of a true-breeding recessive individual (hh) and a true-breeding dominant individual (HH) the F1 generation will all have the same genotype and phenotype. Each offspring will receive a dominant copy of the gene and a receive copy of the gene making the genotype 100% Hh and the phenotype 100% dominant. In the F2 generation, we cross two of the F1 generation offspring. After this cross, we end up with three different genotypes 25% homozygous dominant (HH), 50% heterozygous (Hh), and 25% homozygous recessive (hh). This makes the genotypic ratio 1:2:1 ad the phenotypic ratio 3:1
The biological process of oogenesis differs from how meiosis is traditionally taught in a biology classroom. Please define oogenesis and explain how the true biological process deviates from the traditional teaching of meiosis.
Generally, meiosis is accepted to be the division of a cell to create four daughter cells each with half the number of chromosomes of the parent cell. Typically it is assumed that each of these cells can become a viable sex cell meaning they are of equal size and viability. However, oogenesis, which is the biological process of egg production in a female fetus, does not produce four equal-sized and viable daughter cells. Instead, cells going through oogenesis undergo an uneven division in which one daughter cell receives the majority of parent cell's non-genetic material. As such the end result of oogenesis is one 'large' egg cell that is viable and three polar bodies.
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