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bagirrra123 [75]
3 years ago
13

Among cattle, having horns is a recessive trait. Cattle without horns, which are called polled cattle, are common. Suppose a hor

ned male mated with a polled female. Their offspring are all polled. On maturity, two cattle of the F1 generation mated. Their offspring are a mix of polled and horned cattle.
In the F2 generation, is homozygous dominant and is homozygous recessive.
A.pp
B. PP
C.Pp
Biology
2 answers:
forsale [732]3 years ago
5 0

Answer:

Option B, A

PP is the homozygous dominant pooled offsping

And pp is the homozygous recessive pooled offsping

Explanation:

Let the dominant trait "not having horn" being polled be represented by "P"

Let the recessive trait "having horns" be represented by "p"

As given in question male is horned and is crossed with a female that is polled so that all the offsprings are polled.

This would give the genotype of parents as -

Horned Male - pp

Polled Female -PP

Genotype of  polled offsprings in F1 generation - Pp

If two parents from F1 generation are crossed the the following offsprings would be produced

Pp X Pp

PP, Pp, Pp, pp

Thus, PP is the homozygous dominant pooled offsping

And pp is the homozygous recessive pooled offsping

pshichka [43]3 years ago
3 0
The answer is C

Since the horned is pp and not horned is PP it is Pp 
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Answer:

1. 1.26823082 mL

2. 0.5 g/mL

Explanation:

The density formula is:d=\frac{m}{v}

1.

Rearrange the density formula for v,

d=\frac{m}{v}

d*v=\frac{m}{v}*v                     <em>Multiply both sides by v.</em>

d*v=m

\frac{d*v}{d} =\frac{m}{d}                             <em>Divide both sides by d.</em>

v=\frac{m}{d}

Volume is found by dividing mass by density. The mass is 20 grams and the density is 15.77 grams per milliliter.

m= 20 \ g\\d= 15.77 \ g/mL

Substitute the values into the formula.

v=\frac{20 \ g} {15.77 \ g/mL}

Divide. Note the grams, g, will cancel.

v= 1.26823082 \  mL

2.

Use the density formula.

d=\frac{m}{v}

Density is found by dividing mass by volume. The mass is 10 grams and the volume is 20 milliliters.

m= 10 \ g\\v= 20 \ mL

Substitute the values into the formula.

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Divide.

d= \frac{1}{2} \ g/mL

d= 0.5 \ g/mL

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