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Dafna11 [192]
4 years ago
6

The heart is one of the first parts of the embryo to develop. What part of the stem cell provides instructions for building a he

art?
1) RER

2) DNA

3) Lysosmes

4) Ribosomes
Biology
2 answers:
Sidana [21]4 years ago
8 0

2) DNA

Hope this helps!

Lisa [10]4 years ago
7 0

The answer is 2) DNA

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Jenna is trying to construct a pedigree for the occurrence of red hair in her family. She has two sisters (one older and one you
scoray [572]

Answer: a line connecting her mother and father, a colored circle representing Jenna, and two empty circles representing her sisters

Explanation: Jenna's red hair can be determined by incomplete dominance.

Incomplete dominance is a condition where neither of the alleles responsible for a trait is dominant.

In incomplete dominance, one allele for a specific trait is not completely expressed over its paired allele. So, if an organism is heterozygous for a trait, it shows a third phenotype.

8 0
3 years ago
What plant did Gregor Mendel do all his work on genetics with
Umnica [9.8K]
He worked with pea plants
3 0
4 years ago
A geneticist discovers a new mutation in Drosophila melanogaster that causes the flies to shake and quiver. She calls this mutat
Harrizon [31]

Answer:

1. First calculate the distance of the map for trace (eg) and spastic mutation (sps); Recombinant frequency:

vg + sps + vg sps + = 99 + 97 = 196

we are going to divide 196 by 650 (total descendants) = 0.3.

in the next step we are going to calculate the recombinant frequency 0.3 * 100 = 30 mu or cM or 30%

this shows that there is an association between vestige (eg) and spastic mutation (sps) since the recombinant frequency is less than 50%.

The squareness test is not valid because the combining frequency is far from 50%.

2. Results:

1. Genes are linked.

3. The test rejected the independent assortment law because it is not true that there is a 1: 1: 1: 1 relationship between descendants

8 0
4 years ago
One hundred vegetarian residents of a farming village raise various crops for their own consumption on a parcel of land. They sa
Roman55 [17]

Answer: D. at most 10

Explanation:

Using the energy pyramid, the ratio of grassland to primary consumer to secondary consumer is: 100:10:1 respectively.

Thus if the grassland supports 100 cattle (primary consumer), the numbers of humans (secondary consumer) the cattle can feed will be;

100/10 = 10.

6 0
4 years ago
Which of these is one of the conditions for Hardy-Weinberg equilibrium?
Arisa [49]

Answer:

D. the population must be indefinitely large

8 0
2 years ago
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