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sineoko [7]
2 years ago
15

Why do animals need to take in oxygen?

Biology
1 answer:
Sedbober [7]2 years ago
5 0

Answer:

A) To break down fuel molecules

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An ionic bond occurs when _____.
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________ is the biological heritage (including physical characteristics such as one's skin color and associated traits) that peo
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The mineral crystals in obsidian are too small to see without a microscope. This is because it _____.
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2 years ago
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In garden peas a pure line that is tall with purple flowers is crossed to another pure line that is short with white flowers. Th
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Answer:

See the explanation

Explanation:

Answer 1.

As given that in F1 all are short and white then it can be said according to Mendel's law that short and white are dominant over tall and purple.  

Let S for short s for tall and W for white and w for purple allele.

So the genotype of short purple will be Ssww or SSww. So In first case Ssww self crossed then resultant offsprings will be,

................ Sw .................... sw

Sw ........ SSww ............. Ssww

sw ........ Ssww .............. ssww (tall and purple)

So from this 1/4 will be tall and purple while 3/4 will be short and purple.

In second case SSww only short purple progeny will appear.

Answer 2.

2. a) The female progeny will not show any trait because there are two X chromosome in females , so female offspring can be carrier but not show any trait in case of X- linked trait.

2. b) Half of male offsprings show trait because X is inherited from mother. So the chance of having X-linked recessive allele is 1/2.

2. c) The chance of having X linked affect allele in daughter is 1/2. So the chance of inheriting that X to son will be 1/2 so in total there is chance of 1/4 that son will be affected.

2. d) the chance of first child show this trait will be 1/4 in case of male offspring while 0 in case of female offspring.

Hope this helps!

4 0
3 years ago
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