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3 years ago

Which thick layer of the heart maintains its constant pulse?

1 answer:

5 0

The myocardium is the thick, middle layer of the heart and is composed of cardiac muscle. Cardiac muscle is very unique because it possesses the characteristics of skeletal muscle AND smooth muscle. Skeletal muscle controls the voluntary movement of the body, while smooth muscle is responsible for the movement of all other body organs. The myocardium acts on its own, with no conscious effort.

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Can someone explain what alleles are?

Ivahew [28]

one of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.

8 0

3 years ago

The enlargement of the somatosensory area for dominant fingers in violin players is an example of the effects of __________ on b

guapka [62]

Personal experience on edgenuity

7 0

3 years ago

Read 2 more answers

Flower color in snapdragons results from the amount of the pigment anthocyanin in the petals. Red flowers are produced by plants

USPshnik [31]

Answer:

The genotypes found in the F2 offspring will be An1An1, An1An2 and An2An2.

Explanation:

In the example given in the question, the color of the petals of snapdragon flowers are given with the An1 allele having full activity and the An2 allele being the null allele. For the F1 offspring, two snapdragon flowers are crossed, one with red petals which is An1An1 and one with ivory petals which is An2An2. All the genotypes for the F1 offspring will result in An1An2.

Then using this F1 offspring, the F2 offspring is found and the genotype of the F2 offspring will be An1An1 / An1An2 / An1An2 / An2An2.

So the genotypes found in the F2 offspring will be An1An1, An1An2 and An2An2. One red petal snapdragon, 1 ivory snapdragon and 2 pink snapdragons.

I hope this answer helps.

8 0

3 years ago

Directions: Consider a pedigree that is tracking an autosomal recessive trait, where two recessive alleles (tt) result in the in

Talja [164]

Answer:

I think this should be the chart you were interested in...

Explanation:

Individual Shape in shaded

phenotype pedigrees

Male with gen. TT PTC taster square No

Male with gen. Tt PTC taster square No

Male with gen. tt Non-taster square Yes

Female with gen. TT PTC taster Circle No

Female with gen. Tt PTC taster Circle No

Female with gen. tt Non-taster Circle Yes

*gen- genotype

4 0

3 years ago

In rats, the allele for long whiskers is dominant to the allele for short whiskers. At another gene locus, a dominant allele pro

PilotLPTM [1.2K]

Answer:

25%

Explanation:

We have 2 independent genes with 2 alleles each: L/l and W/w

W_: whiskers
ww: no whiskers
L_: long whiskers
ll: short wiskers

Individuals with short whiskers will have the genotype WWll or Wwll.

A cross between a rat heterozygous for both genes and a homozygous recessive rat is done:

-The homozygous rat will produce only wl gametes.

-The heterozygous rat will produce the following gametes: WL, Wl, wL, wl.

If you do a Punnett Square, you'll get that 25% of the offspring will be WwLl and will have short whiskers.

3 0

3 years ago