Question

In: Biology

In humans, the allele for brown eyes (B) is dominant. The allele for blue eyes (b)...

In humans, the allele for brown eyes (B) is dominant. The allele for blue eyes (b) is
recessive. If a woman with genotype Bb and a man with genotype Bb have a child,
what will be the likelihood of the child having blue eyes?
a 0%
b 75%
c 50%
d 25%
e 100%
------------------------------
What would be the result of a cell that underwent mitosis but not cytokinesis?
a Two daughter cells with no nucleus
b One daughter cell with two nuclei, each containing a normal number of
chromosomes
c Two daughter cells that are unusually small
d Two daughter cells with twice the number of chromosomes
e One daughter cell with one nucleus containing twice the normal number of
chromosomes
---------------------------
What two processes are responsible for the transfer of information from genes to
proteins?
a respiration and translation
b translation and protein synthesis
c respiration and protein synthesis
d translation and mutation
e transcription and translation
--------------------
What is the function of the lysosomes?
a Packaging of proteins
b Digestion and waste removal
c Maintaining cell structure
d Production of energy
e Storage

Expert Solution

1 Let's answer it by the Punnet Square

Brown eyes colour is dominant over blue eyes colour so Brown eyes colour Will express in homozygous and heterozygous condition i.e. BB or Bb

B represents Brown eye colour and b represent blue eyes colour

The genotype of women is Bb which is Brown eye colour as there is one copy of the dominant gene and

The genotype of men is bb and it is a blue eye because no dominant gene is there and the condition is homozygous recessive

Bb x bb

	B	b
b	Bb	bb
b	Bb	bb

These results indicate that each 2 Brown eye and blue eye that means out of 4 so 50% child are blue eyes.

2. The cell which undergoes mitosis a cell division occurred in a somatic cell in different 4 steps namely Prophase, Metaphase, Anaphase and Telophase. Where the nucleus is divided bit not two daughter cells are formed it will only form after cytokinesis which is the last phase of cell division where 2 daughter cells formed by division of cytoplasm so the answer is option b rest of the option are incorrect as per explained above

3.

Option c is correct because in the first process.e transcription the information of DNA is copied in RNA and in the second process this information is translated into Protein this is called translation and it central dogma of molecular biology

4

The option b is correct

It is cell organelles which are mean for digestion and waste removal from the cell contain a digestive enzyme which can digest a different kind of the compound into the cell.

Other option

Protein packaging is Golgi bodies vesicles

The cell structure is maintained by the intracellular cytoskeleton

Energy production in mitochondria

Vacuoles are mean for storage

Thank you,

gladiator answered 7 months ago

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