Genetics Answers

Discuss the functional role of these nucleic acids in protein synthesis and the locations of each stage involved in protein synthesis. 

Explain the nucleotide structure and main features of the following nucleic acids:

• DNA – stages and enzymes involved in DNA replication

• RNA – mRNA, tRNA, rRNA, siRNA

Which of the following statements characterize meiosis II? Select all that apply.

Multiple select question.

A)

Homologous chromosomes line up at the cell equator.

B)

Sister chromatids line up at the cell equator.

C)

Each chromosome consists of two sister chromatids.

D)

Four nuclei start to form around the chromosomes.

E)

Sister chromatids are pulled apart at the centromeres.

F)

The chromosome number is reduced from 2n to n.

G)

Crossing over can occur during synapsis.

H)

The chromosome number remains the same from n to n.

Which of the following statements characterize meiosis I? Select all that apply.

Multiple select question.

A)

Four nuclei start to form around the chromosomes.

B)

The chromosome number remains the same from n to n.

C)

Homologous chromosomes line up at the cell equator.

D)

Sister chromatids are pulled apart at the centromeres.

E)

The chromosome number is reduced from 2n to n.

F)

Each chromosome consists of two sister chromatids.

G)

Sister chromatids line up at the cell equator.

H)

Crossing over can occur during synapsis.

How many crosses should you to produce a beige cat with no stripes if you currently have a beige cat with stripes (ggDd) and a Grey cat without stripes (GGdd). Determine the generation where your ideal cat will appear.

Let

G=Grey

g=Beige

D=with stripes

d=without stripes.

Can Mendelian inheritance applied to explain all inheritance genetic diseases report in humans?or any exceptions?

Anodontia is a recessive hereditary disease which causes the absence of teeth or any tooth germ.

First cross: The father has a normal phenotype and the mother has the disease, the sons are all affected and the girls are always healthy.

Second cross: The father is affected and the mother is healthy, sons and daughters can have a normal or sick phenotype.

1. Determine the chromosomal location of the gene responsible for this disease. Then perform a factorial analysis to verify the above results

a)   On crossing a plant with red fruit and hairy stem, with one that was yellow fruit and hairy stem, the following progeny were obtained:

           30 red, hairy / 11 red, smooth / 29 yellow, hairy / 9 yellow, smooth

Give a reasoned explanation along with the use of full genetic diagrams to proof your answer, to explain these results in terms of the simultaneous transmission of characteristics

a)   On crossing a plant with red fruit and hairy stem, with one that was yellow fruit and hairy stem, the following progeny were obtained:

           30 red, hairy / 11 red, smooth / 29 yellow, hairy / 9 yellow, smooth

Give a reasoned explanation along with the use of full genetic diagrams to proof your answer, to explain these results in terms of the simultaneous transmission of characteristics.

When pre-mRNA is spliced and exons are then joined together, this happens randomly right? How can the chance be high enough then that the intentional mRNA is formed to then form the correct polypeptide sequence of the functional protein? Even if the chances are slim why does this not have an effect on organisms, some may argue this is a mutation in a way, as it is a change in nucleotide sequence.