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astraxan [27]
3 years ago
6

What did the scientist study with his microscope?

Biology
1 answer:
Novay_Z [31]3 years ago
6 0
I found the answer to be cells
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Pedigrees are used to help geneticists understand how traits are inherited between generations. The Romanovs, a Russian royal fa
inysia [295]

Answer:

Waldemar carried the recessive allele.

Explanation:

The carrier is the individual that has the affected allele or mutation but does not express the trait, or might express it in different levels. Although, as the person carries the mutation, she or he might transmit the genetic mutation associated with a disease to the progeny.  In general, these diseases are inherited as recessive traits.

So, in the exposed example we know that:

  • hemophilia is a sex-linked disorder
  • hemophilia is determined by a recessive allele on the X chromosome.
  • Irene is a carrier.
  • Her husband is not a carrier.
  • Her children Waldemar and Henry have hemophilia.

If Irene is a carrier, this means that she is heterozygous and that her genotype is X⁺X⁻ (Being the symbol + the dominant allele, and - the recessive one for that expresses the trait)

The fact that Irene´s husband is not a carrier means that his genotype is X⁺Y

Their boys Waldemar and Henry have hemophilia, so both their genotypes are X⁻Y

The best evidence to prove that Irene was heterozygous for hemophilia is that Alice carried the recessive allele.

  • Alice is Irene´s Mother, and she is a carrier as well. Irene´s father, Louis, is not a carrier, so she could have inherited a dominant allele from her father and a recessive allele from her mother, X⁺X⁻, or she could have inherited two dominant alleles from both her parents X⁺X⁺. This is not proof enough of Irene being heterozygous.
  • The fact that Alexandra, Irene´s sister, was also a carrier does not say anything about Irene´s genotype, because they could both share the same genotype or not. This is not proof of Irene being heterozygous.
  • Frederick (her brother) was hemophilic.  He received a recessive allele from Alice, but this does not say anything about Irene´s genotype.  
  • The fact that Waldemar (her son) was hemophilic, is the best evidence to prove that Irene was heterozygous for hemophilia. Walderman received the Y chromosome from his father and an X chromosome from his mother. The X chromosome that he received from his mother carried the recessive allele for the trait, and this is why he had hemophilia. This means that there is no best evidence for Irene´s genotype than her son´s genotype.

 

6 0
3 years ago
Which statement describes a deciduous tree?
Tanzania [10]
Trees that drop their leaves in colder seasons, in order to conserve water.
7 0
2 years ago
How do humans use their genes to produce more than 22,000 proteins?
Citrus2011 [14]
Dna, is all in the Dna. The Dna is made of adenine, thymine, guanine and cytosine which codes for mrna. The mrna codes for amino acid and proteins are made of amino acids. In response to the gene, a gene is a basically a small part of dna in a certain order that codes for specific traits
8 0
3 years ago
Give a brief description of both<br> Name 3 similarities and 3 differences.
FromTheMoon [43]

Answer:

  • <u>Similarities And Differences:</u>

If a topic, law or scientific research shares the same origin of study, similar to  another topic or term, then they will be compared and further analyzed by the team of scientists and research workers in order to have some conclusions and results.

Explanation:

  • As there are many scientific research and analyses which is been carried out in order to analyze the different elements in the process of comparison between any two subjects and terms.
  • <em>There are various subjects and topics of research work. Many of the scientific research work are in parallel to each other as they  are somehow compared by other scientists and research workers.</em>
7 0
3 years ago
What area would most likely experience the greatest amount of natural erosion?
Ksenya-84 [330]

Answer: Coastline

Explanation:

The erosion is caused by waves from by the storms

5 0
2 years ago
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