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Troyanec [42]
3 years ago
8

In humans if a trait is passed on the X chromosome then the trait is

Biology
1 answer:
vovangra [49]3 years ago
3 0

Answer:

c, recesive

Explanation:

x chromosomes are usually recesive

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In chickens, comb shape is determined by genes at two loci (R, r and P, p). A walnut comb is produced when at least one dominant
mariarad [96]

Answer:

in the obtained options, there is no dominant gene for the crossed pairs, therefore, no answer would be correct, however, when assigning a dominant character to the P gene, the correct answer would be:

E. Rr pp *rrPp

Explanation:

According to the information obtained we deduce:

Comb shape is produced by R and P

Comb of walnuts with an R or a P

Pink comb: 1 dominant P and R at the first locus and 2 recessive at the next locus

Pea comb: 2 recessive at the start and one dominant in the next position

1 single comb: 2 recessive at both loci

Rr pp × rr Pp will produce from the interbreeding: 2 walnuts, 1 single and 1 pea offspring.

We deduce that for the pink comb the genotype is: Rrpp

and for the pea comb it is rrPp

Rr pp × rr Pp generates crosslinks containing RrPp, rrPp, rrpp as children in a 2: 1: 1 ratio.

4 0
3 years ago
Has the question of the origin of the universe been solved? yes, we now know the Universe was exploded and expanded into existen
dalvyx [7]
No, although there are several theories with increasing evidence, there is still no way to know for sure how it occurred. The great mystery of the beginning of universe is way too vast and vague. Theories can only be proven by presenting a solid proof, but great creations such as universe itself doesn't have to be solved. Various possibilities must have happened or there must be a one conclusion leading to its existence; but moreover, it is not our problem to solve. The confirmation of beginning of its existence will only feed the curiosity of humans.
3 0
3 years ago
Read 2 more answers
A man with the autosomal recessive disorder phenylketonuria (PKU) and a woman without PKu heve a son named Peter, who does not h
Anton [14]

Answer:

<h2>2. Peter's maternal grandfather has PKU.</h2>

Explanation:

  • Such type of the genetic disorder in which two copies of a gene must be mutated at a time is called autosomal recessive disorder such as sickle cell anemia, phenylketonuria, and some other diseases.
  • When a sing copy of a gene is mutated in a person then this disorder is not appeared and the person is called a carrier.
  •  So when a child is born by two carrier parents then there is a chance that a child will be affected if both the parents donate mutated genes.
  • In the case of Peter, since peter does not show this defect this means his maternal grandfather was affected by this disorder.

5 0
3 years ago
Which of the following was NOT used by Darwin in his studies?
koban [17]

Answer:

i think you forgot to pu in the answer choices

Explanation:

4 0
2 years ago
Distinguish Is carbon dioxide (CO2) a pure substance or a mixture? Explain
nasty-shy [4]

Answer:

A, hope this helps u out

6 0
2 years ago
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