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2 years ago

In a BB x bb cross

Biology

2 answers:

Anna71 [15]2 years ago

5 0

Answer:

a. 100% of the offspring will have the Bb genotype

Explanation:

In a BB x bb cross, the one with BB genotype produces B gamete, while the other only produces b gamete.

Therefore, the zygote in this cross has Bb genotype.

Nikitich [7]2 years ago

5 0

Answer:

100% of the offspring will have the Bb genotype

Explanation:

This cross involves a single gene that has two alternative forms called ALLELES. One allele is 'B' and the other is 'b'. In the cross, both parents are purebreeding or homozygous i.e. they contain identical alleles for a particular trait (BB and bb). Therefore, according to Mendel's law of segregation, the alleles of each parent will separate into gametes during meiosis.

Parent 'BB' will produce gametes containing allele 'B' while parent 'bb' will produce gametes containing allele 'b'. Each gametes will then combine randomly. Since only gametes B and b are produced by each parent, all the offsprings produced will have a heterozygous genotype: Bb. Hence, 100% of the F1 offsprings will possess Bb genotype.

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Burka [1]

Answer:

Vasopressin

Explanation:

Vasopressin is an anti-diuretic hormone. Its main function is to control the osmolality and volume of body fluids, helping the body to lose fluids. The secretory neurons are activated as a result of increased osmotic pressure or reduced blood pressure, which is also reduced by this hormone. The release of this hormone has a potent vasoconstrictor effect, causing water retention to increase, acting as an antidiuretic hormone. The increased permeability of the collecting tubules and the thick ascending branches of the Henle loop, resulting from the exposure of aquaporins to the apical membrane, enables the diffusion of water found in the tubule cells to the medullary region of the kidney.

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3 years ago

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lukranit [14]

1. a) father (Rr), mother (rr)

b) from the attached file(1)

c) the possible genotypes are

Rr - 50%
rr - 50%

d) but from the information given above the only possible genotype for SpongeGerdy is Rr, because we were told that she was squarepants

e) Rr

f) from the attached file(2)

g) the possible genotypes are

RR - 25%
Rr - 50%
rr - 25%

h) the genotypes for squarepants are RR and Rr

therefore probability is (25 + 50)% = 75% or 3/4

i) the only genotype for roundpants is rr

therefore probability is 25% or 1/4

2. a) wilba - Ee , wilbur -EE

b) from the attached file(3)

c) the possible genotypes are

EE - 50%
Ee - 50%

d) the genotypes for round eye are EE and Ee

therefore probability is (50 + 50)% = 100% or 1

e) the only genotype for oval eye is ee

therefore probability is 0

3. a) squidward - BB . squidette - bb

b) from the attached file(4)

c) the only possible gene is Bb - 100% or 1

d) the genotypes for a light blue skin are BB and Bb

therefore probability is (0 + 100)% = 100% or 1

e) the only genotype for a light green skin is bb

therefore probability is 0

f) No, they are not. this is because they are heterozygous i.e.( they carry gene for a light green skin)

g) from the attached file(5)

h) the possible genotypes are

BB - 25%
Bb - 50%
bb - 25%

i) the genotypes for a light blue skin are BB and Bb

therefore probability is (25 + 50)% = 75% or 3/4

j) the only genotype for a light green skin is bb

therefore probability is 25% or 1/4

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