1
where does meiosis occur
the gonads
what is the immediate threat to life from serious burns
fluid loss
what are the 2 chief parts of the hair
root and shaft
what two tissue types make up the hypodermis and which one is more present
areolar<adipose
how many chromosomes do our gametes have
23
define a first degree burn
damage only to the epidermis
how is sebum made
holocrine secretion
what do langerhan cells present foreign antigens to
Killer T cells
what is a homozygote
an organism with two of the same alleles
if an organism has 78 chromosomes, how many will it’s gametes have
39
from superficial to deep without the “optional later” what are the layers of the epidermis
Sc, Sg, Ss, Sb
what are the structures that nourish the layers of the dermis
subpapillary plexus and cutaneous plexus
a trait/phenotype is determined by what factor
gene
how many chromosomes do humans have
46
when two forms of the same gene exist together they are called
alleles
in what stage of meiosis do sister chromatids separate
anaphase 2
kind of organism are humans
diploid
define a monohybrid cross
a cross between two hybrids considering 1 trait
if an organisms genotype is AABbCc, what is AbC
a possible gamete
according to the slide, is the hypodermis part of the skin/integumentary system
no
i’m what stage does independent assortment of non homologous chromosomes occur
metaphase 1
what is the purpose of meiosis
produce gametes
what are the two distinct layers of the skin
dermis and epidermis
define a dihybrid cross
a cross between two hybrids considering 2 traits
in what stage of meiosis do homologous chromosomes separate
anaphase 1
how much body weight does the skin account for
7%
what is the principle of independent assortment
alleles of genes separate independent from each other
What is a loci
location of a specific gene in the chromosome
what is the purpose of a testcross
to determine an unknown genotype
what is the result of meiosis
4 genetically unique haploid cells
what is the principle of dominance
when a dominant and recessive form of an allele co exist in an organism the dominant trait determines the phenotype
what is the principle of segregation
alleles/gene pairs separate during gamete formation
define pleiotropy
1 gene affecting multiple traits/phenotypes
what is a heterozygote
an organism with two different alleles
if an average height male crosses with a female with achondroplasia, what will the phenotype and genotype be
50/50 dwarf and average
if I cross a red and white snapdragon which exhibit incomplete dominance, what will my phenotypic and genotyping ratio be
100% pink RR’
how are keratinocytes connected
desmosomes
define polygenic inheritance
multiple genes affecting one trait/phenotype
what are the 2 layers of the dermis
papillary later and reticular layer
what happens when the dermis and epidermis separate
a blister forms
If a colorblind woman and a wild type man have offspring, what percentage of males will be colorblind
100%
which is not one of the cell types of the epidermis: keratinocytes, melanocytes, langerhan cells, merkel cells, ceratinocyte
ceratinocyte