Air is forced into the lungs by the contraction of thea. alveoli.c. diaphragm.b. bronchioles.d. heart.

A father has two copies of a lactose persistence allele , he is homozygous dominant. The mother has one copy of that allele , sh

Contact [7]

The answer is C. ( use Punnett squares)

8 0

3 years ago

Read 2 more answers

Which statement explains why the recombination frequency between two genes is always less than 50%?A) recombination cannot be mo

Vitek1552 [10]

Answer:

Option (D).

Explanation:

Recombination frequency nay be defined as the the frequency of crossover of a single chromosome during meiosis. The maxiumum recombination frequency is 50%.

Genes that has recombination frequency nearly equal to 50% are considered as unlinked genes. Unlinked genes cannot undergo the recombination process and may have equal chances to inherit together or can inherit separately in the next generation.

Thus, the correct answer is option (D).

8 0

2 years ago

You will need to think about your knowledge of particle theory to answer this question.

N76 [4]

Answer:

a = increased temperature increases the kinetic energy of the gas molecules.

b = higher temperatures will increase the energy and therefore the movement of the molecules, increasing the rate of diffusion.

3 0

2 years ago

How does an increase in blood flow to the skin help to cool us down when temperatures are high?

wariber [46]

Your blood vessels dilate which is called vasodilation, this allows your blood to carry out the excess heat from inside your body to the outside.

4 0

3 years ago

Suppose that in unicorns, two autosomal loci interact to determine the type of tail. One locus controls whether a tail is presen

Nina [5.8K]

Explanation:

As you can see in the picture below, this is a dihybrid cross with a twist.

We can accomplish that mutually parentages are heterozygotes for both characters because the genotypes are

9 unicorns with curly tails (shown in green)

3 with straight tails (shown in red)

3 curly tales trait carriers with no tail (shown in dark blue)

1 straight tail trait carriers with no tail ( shown in light blue)

If this was an ordinary case of the dihybrid cross, we would get a 9:3:3:1 phenotype ratio.

However, since the first trait, the presence of the tail, is affecting the other trait, the trait texture, the ratio is altered.

$\frac{1}{4}$ of the offspring (genotypes tt C_ and tt SS) has no tail, therefore we cannot observe the texture of the tail (some of the tailless individuals have Curly alleles -blue squares marked with green, some of them have Straight alleles -blue square marked with red ).

Therefore, the altered ratio is $\frac{1}{2}$ curly tails, $\frac{1}{4}$ straight tales, $\frac{1}{4}$ tailless

6 0

3 years ago