Answer:
- 120 individuals yySs
- 60 individuals yyss
Explanation:
<u>Available data</u>:
- Two autosomal diallelic genes Y and S
- Y is the dominant allele that codes for yellow
- y is the recessive allele that expresses black
- S is the dominant allele that expresses stars
- s is the recessive allele that codes for starless
- Lethal genotypes: YYss and yySS
1st cross: A true-breeding yellow star bellied sneetch with a true-breeding black starless sneetch
Parentals) YYSS x yyss
F1) 100% YySs
N = 50
2nd Cross:
Parentals) YySs x YySs
Gametes) YS, Ys, yS, ys
YS, Ys, yS, ys
Punnett square) YS Ys yS ys
YS YYSS YYSs YySS YySs
Ys YYSs YYss YySs Yyss
yS YySS YySs yySS yySs
ys YySs Yyss yySs yyss
F1) N = 840
- 14/16 survivers
- 2/16 death YYss and yySS
- 9/16 yellow with stars
- 2/16 yellow starless Yyss
- 2/16 black with stars yySs
- 1/16 black and starless, yyss
14 ------------------ 100% of the progeny --------------840 individuals
2 yySs -----------X = 14.28% ------------------------------X = 120 individuals yySs
1 yyss ------------X = 7.14% ------------------------------X = 59.97 individuals yyss
1. A caelifera, or more commonly known as the grasshopper belongs in the animal kingdom. Grasshoppers are a leafy green and can be found in a variety of habitats. They can be found in lowland tropical forests or grasslands. Higher classification for the grasshopper would be Orthoptera. Grasshoppers are jumping insects that belong to the arthropod phylum.
Strong, long hind legs that help them jump. This adaptation helps them get away from harm and jump higher.
3. I said some in the first paragraph.
4. Important in grassland ecosystems and play a role in the nutrient cycling.
5. I don’t think there really is anything else.
Providing long-term control over the body's internal conditions
Keeping conditions within a normal range
Adjusting the "set point" for body temperature based upon level of activity
Melanin provides pigmentation to the skin and it also provides UV ray protection (which is its role in the epidermis).
B. 245 million
from the end of Carboniferous Period to the beginning of the Triassic period
