Answer:
Explanation:
A. Warmer tempartures,clearing
Answer:
Because different cells are under different pressure. The most frequently replaced cell would be skin cells while on the opposite scale we have neurons. Skin is under constant pressure so we have to replace it as quickly as possible where as neurons must be replicated only once so we can maintain a stable brain.
Explanation:
Complete question:
Snow leopards live in the high reaches of the Himalayas and have several adaptations to deal with living most of the time in snow. They have wide paws with hair between the toes to allow them to run on top of the snow crust. Assume that wide paws (W) and hair between the toes (T) are both dominant traits and are on the same chromosome. Suppose that two snow leopards, heterozygous for both traits, mate. Suppose further that in the female, the two dominant alleles are on the same chromosome of the homologous pair, while in the male, each chromosome of the pair has one dominant and one recessive allele.
1) What percentage of each of the following genotypes will be produced?
- WwTT:
- WwTt:
- Wwtt:
- wwTT:
- wwTt:
- wwtt
2) How many of the offspring (assume 4 cubs) will have narrow paws with hair between the toes?
Answer:
1) Percentage of each of the following genotypes
- WWTT: 0
- WWTt: 1/4 = 25%
- WWtt: 0
- WwTT: 1/4 = 25%
- WwTt: 0
- Wwtt: 1/4 = 25%
- wwTT: 0
- wwTt:1/4 = 25%
- wwtt: 0
2) Offspring with narrow pows: 1 of four individuals.
Explanation:
<u>Available data:</u>
- wide paws (W) and hair between the toes (T) are both dominant traits
- narrow paws (ww) and no hair (tt) are bothe recessive traits
- Both traits are on the same chromosome.
- Female: W and T on the same chromosome of the homologous pair, w and t on the other chromosome.
- Male: W and t on the same chromosome of the homologous pair, w and T on the other chromosome.
Cross: Between two heterozygous individuals
Parental) WwTt x WwTt
Sex) Female Male
Gametes) WT wt Wt wT
Punnett square)
WT wt
Wt WWTt Wwtt
wT WwTT wwTt
F1) Genotypes:
Phenotypes:
- 2/4 = 1/2 = 50% wide paws with hair (W-T-)
- 1/4 = 25% wide paws with no hair (W-tt)
- 1/4 = 25% narrow paws with hair (wwT-)
The genetic variation between humans and orangutans is the greatest is the right option.
Explanation:
A phylogenetic tree is illustration which shows evolutionary relationship between different species. This concept is based on Darwin's descent with modification.
Human and orangutan are 97% similar in their DNA sequences.
The difference in DNA bases shows large genetic variations in both the species.
The species are organized on the basis of traits that are changed over time as compared to their ancestors as they evolve.
Less related species will have more differences in their DNA sequence.
The phylogenetic tree formed indicates that orangutan and human are less related to each other than other species.
