All categories

3 years ago

How are the respiratory system and the circulatory system connected.

Biology

1 answer:

Free_Kalibri [48]3 years ago

6 0

Answer:Both systems work together to circulate blood and oxygen through the human body.

Explanation:

You might be interested in

In a plant, leaf color and leaf shape are controlled by two linked genes Leaves of the wild-type plant are red. A recessive muta

Brrunno [24]

Solution :

Red is dominant over the white leaves and pointed is dominant over smooth.

Red = R , white = r

Pointed = P , smooth = p

Red, pointed x white,smooth ------ Parents

RRPP rrpp

RP rp ----------------- Gametes

RrPp -------- $F_1$

(red, pointed)

When this $F_1$ is test crossed,

RrPp x rrpp ---- $F_1$ test cross

Gametes → rp

RP ---------- RrPp - red, pointed - 36 parental type

Rp ---------- Rprp - red, smooth - 14 re- combination

rP ----------- rrPp - white pointed - 10 re- combination

rp ----------- rrpp - white, smooth - 40 - parental type

Total = 100

As this ratio is deviating from 1:1:1:1, it indicated the two genes are linked.

Linkage strength = percentage of crossing over = map distance between the genes.

Percentage crossing = recombination frequency = percentage of recombination.

Recombination frequency $=\frac{\text{total no. of recombination}}{\text{total no. of progeny}}\times 100$

$=\frac{14+10}{100} \times 100$

= 24 %

= 24 map units

4 0

3 years ago

Drosophila melanogaster is the scientific name for fruit fly. What is the name of the genus?

Fudgin [204]

Drosophilia, is the genus name.

8 0

3 years ago

What is the complementary RNA sequence for the DNA sequence ATA<br> CGC TAA*

Darina [25.2K]

Complementary RNA (cRNA) is a copy of a strand of RNA that will bind to the appropriate region of the original molecule. If the original RNA stand had a base sequence of AUU, for example, the sequence of the cRNA strand would be UAA.

6 0

3 years ago

Which organelles of a cell possess their own DNA?. A) Lysosomes and plasma membrane. B) Mitochondria and chloroplasts. C) The Go

Kisachek [45]

<span>Nucleus is the central organelle of the cell which encloses the DNA. Apart from the nucleus, there are few other organelles which have their own DNA.Mitochondria,power house of the cell has its own DNA.so the selected cell possess is mitochondria and chloroplasts.</span>

4 0

3 years ago

Read 2 more answers

Which step can occur even more rapidly by PCR?a. target DNA removed from cells and isolated b. cloning host treated with calcium

lisabon 2012 [21]

Answer:

E. Gene is amplified by multiplication of cloning host

Explanation:

PCR is a very powerful technique that can help us to amplify exponentially one gene from a very small sample of DNA.

As seen in the attached image, the process begins with a single DNA molecule, for the first cycle, that DNA molecule denaturalizes into two strands, the primers bind to their complementary sides and then the DNA polymerase builds the new DNA strands. The number of copies of the gene that can be obtained with each cycle are 2ⁿ copies, where n is the cycle number.

7 0

3 years ago