Question

1. how many chromosomes does a human skin cell have?

a of those come from your dad and

1. how many chromosomes does a human egg cell have?
2. when a human egg and a human sperm cell combine during called a zygote, has __ chromosomes.

sperm
egg
zygote

20 34 90 9 23 92 46

Explanation:

Step1: Identify skin cell chromosome count

Human somatic cells (like skin cells) are diploid, with 46 chromosomes.

Step2: Split parental chromosome contribution

Diploid cells get half chromosomes from each parent: $\frac{46}{2}=23$.

Step3: Identify egg cell chromosome count

Human gametes (egg/sperm) are haploid, with 23 chromosomes.

Step4: Calculate zygote chromosome count

Zygote forms from fusion of two haploid gametes: $23+23=46$.

Answer:

1. 46

a. 23, 23

1. 23
2. 46