Question

data analysis
use the information from the reading, the data table and your knowledge of biology to answer the questions that follow.
fertilized eggs containing embryos from the same species of alligator were incubated at different temperatures. the sex of the hatched offspring is shown in the table below.
sex of offspring incubated at different temperatures

temperature of egg incubation	26°c	28°c	30°c	32°c	34°c	36°c
number of embryos that died	80	4	3	2	6	30
number of females hatched	20	96	97	88	0	10
number of males hatched	0	0	3	12	94	90

1. the percent of surviving females at 32°c from the original number of eggs incubated was

(1) 13%
(2) 2%
(3) 85%
(4) 88%

1. how many more females hatched than males?

show work here!
my answer is:

1. which conditions are worse for the hatching of females? cold or warm?
2. a review of this data could lead to the conclusion that

(1) the most alligator eggs hatch if incubated at 28°c
(2) the sex of the offspring depends on the incubation temperature
(3) female alligators develop at higher temperatures
(4) temperature doesnt affect the survival of alligator embryos

Explanation:

Step1: Calculate surviving females percentage at 32°C

The number of eggs incubated at 32°C is 100, and the number of females hatched is 85. The percentage is calculated as $\frac{85}{100}\times100\% = 85\%$.

Step2: Calculate difference in number of hatched females and males

Sum of females hatched: $20 + 95+85 + 0+12=212$. Sum of males hatched: $0 + 0+3+94 + 14=111$. The difference is $212 - 111 = 101$.

Step3: Analyze hatching conditions for females

Looking at the data, at lower temperatures (26°C - 28°C), fewer females hatch compared to higher - moderate temperatures. So cold conditions are worse for hatching females.

Step4: Analyze data conclusion

As the incubation temperature changes, the sex - ratio of the hatched offspring changes. So the sex of the offspring depends on the incubation temperature.

Answer:

1. (3) 85%
2. 101
3. Cold
4. (2) the sex of the offspring depends on the incubation temperature