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lys-0071 [83]
3 years ago
11

How to solve these questions

Biology
1 answer:
malfutka [58]3 years ago
7 0

Answer:

(i) An allele is a variant of a gene, can either be short or tall.

Dominant = the tall allele that "trumps" the short allele. if a dominant and recessive allele is present (heterozygous) then the dominant phenotype will be shown.

(ii) David's eyes are Brown

(iii) Sarah's eyes are blue

(iv) David - B, b

Sarah - b, b

(v) Possible genotypes include Bb and bb. These give the phenotypes of brown eyes or blue eyes.

(vi) The chance for blue eyes is 50% (or 1:1 ratio)

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vekshin1
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3 years ago
Describe the cause of different blood type groups.
adell [148]

Answer:

Scientists believe that the different types we know emerged as early humans adapted to infectious diseases.

Explanation:

Different human blood types probably emerged to ward off infectious diseases. The incompatibility of some blood types, however, is only an "accident" of evolution. But this is a relatively recent problem, since blood transfusion has been around for only a few hundred years.

There are four main blood types. The oldest is B, which must have originated about 3.5 million years ago - it existed even before the human species evolved from its hominid ancestors, from a genetic mutation that modified one of the sugars in the surface of red blood cells.

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4 years ago
PLS HELP
victus00 [196]

I think your answer should be B. an organism. Hope this helps. =^-^=

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What are gametes? When they go through meiosis are the daughter cells exactly the same or different?
jarptica [38.1K]

Answer:

Gametes are the reproductive cells or sex cells of an organism, found in both males and females. When they go through meiosis,  the daughter cells end up with genetically unique chromosomes.  

Explanation:

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Question 4(Multiple Choice Worth 4 points)
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CH2O5 +603-6CO2 + 6H2O + energy isn't the evidence of conservation of mass in cellular respiration.

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Law of conservation of mass states that mass can neither be created nor be destroyed. And this law holds good for all sorts of chemical reactions except the nuclear reactions.

In case of cellular respiration, one molecule of glucose reacts with 6 molecules of oxygen to produce 6 molecules of carbon dioxide and 6 molecules of water and energy. Now this energy that is produced isn't produced in expense of mass, but in expense of chemical bonds that are present in glucose molecules.

Also if we calculate the number of atoms on each side of the reaction, the number of atoms remain same as well as number of atoms of individual elements also remain same.

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