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3 years ago

All of the statements about bacteria are true EXCEPT one. Which statement is not true?

1 answer:

8 0

d. The majority of bacteria on earth can cause disease, if given the opportunity. Most bacteria don't cause disease and some are even beneficial to the body (good bacteria).

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In hamsters, we can examine the genes for coat color and eye color which are linked:B = brown coat, b = white coat, G = green ey

Inessa [10]

Answer:

10.2 cM

Explanation:

Given,

pure breeding parent 1 : BBgg = brown coat and pink eyes

pure breeding parent 2 : bbGG = white coat and green eyes

BBGG X bbgg = F1 = BbGg ( All are brown with green eyes )

When F1 progeny is test crossed with white coat and pink eyes hamster:

BbGg X BbGg = F2 =

brown, pink eyes = 99 = parental

white, green eyes = 103 = parental

brown, green eyes = 12 = recombinant

white, pink eyes = 11 = recombinant

Recombination frequency =

(total number of recombinants / total progeny ) * 100

= [( 11 + 12 ) / ( 99 + 103 + 12 + 11 )] * 100 = (23/225)*100 = 0.102 * 100 = 10.2 %

1 % recombination frequency = 1 cM distance between genes

Hence, the distance between B and G gene is 10.2 cM

4 0

3 years ago

Give one example of how natural selection can change the distribution of a trait

Andrej [43]

An example is sexual dimorphism. This refers to differences between the phenotypes of males and females of the same species. In humans, for example, males and females have different heights and body shapes.

5 0

3 years ago

The East African rift is an example of a(n)

elena-14-01-66 [18.8K]

Answer:

d Divergent plate boundary

4 0

3 years ago

Read 2 more answers

1.How do earthworms return nutrients to the ecosystem?

Anettt [7]

1. when a earth worm eat it deposits nutrient by pooping
2. earth worm, feed grass, feed cow, human eat cow

4 0

3 years ago

Read 2 more answers

Normally, wild violets have yellow petals with dark brown markings end erect stems. Imagine you discover e plant with white peta

Wittaler [7]

Answer:

It is fascinating to observe two distinct characters presented by the same plant. The inheritance of this plant can be determined easily by crossing the pure violets exhibiting yellow petals with dark brown marking and erect stems with violets exhibiting no markings, white petals, and prostate stems.

The F1 progeny will originate as a hybrid of the two characters. These F1 plants will then be crossed between themselves and the F2 progeny would be clearly evaluated. If the F2 plants come in the phenotypic ratio of 3: 1, then it would indicate the pleiotropic effect of the alleles found in a single locus. If any other combinations arise post crossing, it would indicate that the non-wild type phenotype is because of many distinct mutant genes.

5 0

3 years ago