4 years ago

Why did identifying rock layers because of their fossils become important?

2 answers:

3 0

Hello there.

Why did identifying rock layers because of their fossils become important?

It was the first indication that the layers were from different ages.

slega [8]4 years ago

3 0

D is the answer. hope I helped yalll

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Which type of mutation occurs only in gametes?

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Answer:

germ line mutation

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3 years ago

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In fruit flies, long wings are a dominant trait (L) and short wings are a recessive trait (l). Two fruit flies that are heterozy

Nikolay [14]

Answer:

Explanation:

Both parents are hetero-zygous, so each has alleles Ll.

When Ll crosses with Ll, we have

LL 25%

Ll 50%

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3 years ago

In pea plants, height is determined by an allele for tallness (T) that is dominant over an allele for shortness (t). What is the

gogolik [260]

Ans.

Heterozygous organisms show presence of two alternatives alleles for same trait. For plant height, a heterozygous tall plant, will show both the T (for tallness) and t (for shortness) alleles, as T allele is dominant over t allele. When a cross is made between heterozygous tall plants (Tt), there are 50% chances that a randomly selected allele will carry allele for shortness (t) as shown below:

Thus, "the probability that a randomly selected gamete will carry 't' allele in a cross between heterozygous tall pea plants, is 1/2."