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4 years ago

Can two people with brown eyes have a blue eyed baby

Physics

1 answer:

Elena L [17]4 years ago

8 0

Answer:

Yes

Explanation:

Each person has two alleles (forms of a gene) for a characteristic. We can represent them using letters.

Dominant trait are written as capitals. If a dominant allele is present in someone's genotype, the dominant trait will show.

The recessive trait only shows if a person has two recessive alleles.

Brown eyes is a dominant trait, and blue eyes is a recessive trait.

B = dominant brown eyes

b = recessive blue eyes

If someone has brown eyes, their genotype can be:

If someone has blue eyes, their genotype is:

The baby's genotype must be bb because it has blue eyes. The baby gets one allele from each parent.

See the photo for Punnett square. If the parents are both Bb, then they could each give the b allele, resulting in a blue-eyed baby.

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3 years ago

What is the change in internal energy if 20 J of heat is released from a system and the system does 50 J of work on the surround

hjlf

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3 years ago

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A hot air balloon is traveling vertically upward at a constant speed of 4.5 m/s. When it is 28 m above the ground, a package is

ella [17]

Answer:

1.97 seconds

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.8 m/s²

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Solving the above equation we get

$t=\frac{-45+\sqrt{45^2-4\cdot \:49\left(-280\right)}}{2\cdot \:49}, \frac{-45-\sqrt{45^2-4\cdot \:49\left(-280\right)}}{2\cdot \:49}\\\Rightarrow t=1.97, -2.89$

So, the time the package was in the air is 1.97 seconds

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3 years ago

An archer wishes to shoot an arrow at a target at eye level a distance of 50.0m away. If the initial speed imparted to the arrow

notka56 [123]

Given:
Hmax (distance) = 50.0m
v₀ = 70.0m/s

Required:
what angle should the arrow make with the horizontal as it is being shot

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Hmax = v₀²sin²θ / 2g
sin²θ = 2gHmax / v₀²
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3 years ago

The distance between two successive maximaof

denpristay [2]

Answer:

v = 1.224 m/s

Explanation:

given,

distance between the two successive maxima = 1.70 m

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time = 11 s

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$f = 0.72\ Hz$

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v = f x λ

v = 0.72 x 1.70

v = 1.224 m/s

Hence, the wave speed is equal to v = 1.224 m/s

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4 years ago