<span>Vascular plants can be classified into two major types:
gymnosperms or angiosperms</span>
Answer:
Composite, shield, cinder cones, and supervolcanoes are the main types of volcanoes.
Composite volcanoes are tall, steep cones that produce explosive eruptions.
Shield volcanoes form very large, gently sloped mounds from effusive eruptions.
Volcanoes have several shapes, which are controlled by the composition of the magma and the nature of its eruption. If a volcano produces very fluid lava (low in the compound SiO2, or silica), the magma flows a long distance before it cools, making a flat, shield-shaped volcano.
Explanation:
A (n) <u>homeotic</u> gene is a type of gene that regulates development and that, when mutated, leads to organisms with structures in abnormal or unusual locations on their body.
A homeotic gene is a gene that intervenes in the developmental program that determines the location of structures along the anteroposterior axis.
- The determination of the anteroposterior axis is one of the earliest events in development, and it guides the remaining processes of organogenesis.
- Once homeotic genes define the identity of the body segments, they code for proteins (homeodomain) that are responsible for activating other genes.
- These genes ultimately trigger the formation of the organs or limbs of this segment.
- Genes that control the position of organs have been called homeotic genes, while mutations that affect these genes are known as homeotic mutations.
Therefore, we can conclude that homeotic genes are expressed in the body regions that will house the growing structures.
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A. I looked it up and it said that they eat eucalyptus leaves and that’s why they are special.
Answer:
D) 0.04
Explanation:
Assuming that <em>a </em>is the recessive allele when homozygous that causes the polycystic kidney disease and <em>A </em>is the dominant one:
Since Penelope's sisters has the disease, she must be homozygous recessive (<em>aa)</em>. Her parents must both be <em>Aa </em>(otherwise her sister wouldn't have inherit the disease). So, the probability of Penelope of being heterozygous (<em>Aa</em>) is 0.5.
On the other hand, the probability of having the disease in the population is 0.04 (1 minus the probability of not having the disease which is 0.96). This, according the Hardy–Weinberg principle, in the population would represent the genotype frequency . So, the allele <em>a </em>would have a frequency = = 0.2. Since the gene has only two alleles, all alleles must be either<em> A</em> or <em>a</em> , therefore p + q = 1. So, the <em> A </em>population's frequency is p = 1 - q = 1 - 0.2 = 0.8.
The European man's probability of being <em>Aa</em> (doesn't have the disease but can carry the disease allele) is 2pq = 2 x 0.8 x 0.2 = 0.32.
The probability of Penelope and the European man of having an ill kid (assuming they both are <em>Aa</em>) is 0.25.
Finally, given the Penelope's probability of being <em>Aa</em> (0.5), the European man's 's probability of being <em>Aa</em> (0.32) and the probability of having a kid homozygous recessive <em>aa </em>(0.25) = 0.5 x 0.32 x 0.25 = 0.4 is the probability that they will have a child with ARPKD.