The crossing over mechanism of genetic variation results from the exchange of gene segments between non sister chromatids. The correct answer is A.
SOS:
The answers is:
In a dihybrid cross, the F2 will have nine genotypes, but only four phenotypes because the <u><em>Heterozygous</em></u> genes cause the <u><em>Dominant</em></u> traits to mask the <u><em>Recessive</em></u> traits.
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Answer:
Option B, Tinea capitis
Explanation:
Superficial fungal infection of skin of head or scalp is known as Tinea capitis.
These fungal infection attack the hair shafts and follicles and is a superficial form of mycosis or dermatophytosis.
Tinea cruris is the superficial infection of genitals, buttocks and inner thighs regions. Hence, option A is incorrect.
Tinea pedis is the superficial infection of foot and regions between the phalanges. Hence, option C is incorrect.
Tinea corporis is the superficial infection of arms, legs or skin. Hence, option D is incorrect.
Thus, option B is correct.
Answer:
Net force=120N-90N=30N
30N to the right
Answer:
it allows some but not all
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